Thoughtful curiosity builds knowledge, and knowledge builds thoughtful curiosity

Tuesday, September 24th, 2024

AI systems are often trained through trial and error, with a reward function:

For example, you might teach a computer to learn to ride a virtual bike in a simulated 3D environment by rewarding the distance pedalled, and penalising the number of times the bike falls over.

The challenge comes when the reward function misses what the human programmers really wanted. Perhaps the AI will avoid the risk of falls by leaving the bike on the floor, or maximise distance pedalled by wobbling in a big circle or even by standing the bike upside down and cranking the pedals.

[…]

The more complex the desired behaviour, the easier it is to accidentally reward the wrong thing. But there is a clever and effective approach for training computers to solve a fairly wide range of problems: reward curiosity. More precisely, reward the computer when it encounters situations in which it finds the outcome unpredictable. Off it will go in search of something it hasn’t seen before.

Shane writes: “A curiosity-driven AI will learn to move through a video-game level so it can see new stuff, avoiding fireballs, monsters and death pits because when it gets hit by those, it sees the same boring death sequence.” Death is to be avoided not for its own sake, but because it’s terribly predictable.

All this is fascinating in its own right, and hints at why humans themselves might have evolved a sense of curiosity. But AI systems, like 13-year-old boys, can also be curious to the point of distractibility themselves. For example, ask a curiosity-driven AI to teach itself to play a Pac-Man-style game in which ghosts move randomly around a maze, and you will struggle: the AI doesn’t need to do anything to have its curiosity satisfied, because unpredictable ghosts are endlessly fascinating. Or, as Shane explains, a curiositybot will quickly learn to navigate a maze, unless one of the maze walls has a TV on it that shows a series of random images. “As soon as the AI found the TV, it was transfixed.” Much like my son. Or, for that matter, me.

This problem is sufficiently well known to AI researchers that it has a name: the “noisy TV problem”,

[…]

One solution is defensive: avoid noisy TVs.

[…]

But a second approach focuses more on the positive. As well as trying to cut out mere novelty, we should seek out things worth being curious about. This is easier than one might think, because thoughtful curiosity builds knowledge, and knowledge builds thoughtful curiosity.

[…]

The more you know, the more you will prefer something in-depth, rather than the next thumbnail recommended by YouTube.

Previously, tsunamis caused by landslides typically created waves that died out within a few hours

Friday, September 13th, 2024

Last September, seismologists detected a monotonous hum emanating from Greenland — for nine days:

Soon after the vibrations began, a cruise ship sailing near fjords in Greenland noticed that on the remote Ella Island, a key landmark — a base used for scientific research and by the Danish military for sled dog patrols — had been destroyed.

[…]

The initial trigger came when warming temperatures caused the tongue of a thinning glacier to collapse, the researchers found. That destabilized a steep mountainside, sending a rock and ice avalanche crashing into Greenland’s deep Dickson Fjord. That displaced a massive volume of water, so a towering wave traveled across the narrow fjord, which is about 1.5 miles wide.

The tsunami waves — some at least as tall as the Statue of Liberty — ran up the steep rock walls lining the fjord. Because the landslide struck the waterway at a nearly 90-degree angle, waves bounced back and forth across it for nine days — a phenomenon scientists call a seiche.

[…]

The team determined that Ella Island — about 45 miles from the landslide — was battered by a tsunami at least 13 feet tall. Tourists sometimes visit the island.

“Just a couple of days before the event, cruise ships were there and they were on the beach,” Svennevig said. “It was really, really lucky that no one was there when it happened.”

This seiche was the longest scientists have ever observed. Previously, tsunamis caused by landslides typically created waves that died out within a few hours.

I hadn’t heard the term seiche before, and I wasn’t sure how to pronounce it. Was it Danish? Japanese? No, French — or Swiss-French:

A seiche (SAYSH) is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbors, caves, and seas. The key requirement for formation of a seiche is that the body of water be at least partially bounded, allowing the formation of the standing wave.

The term was promoted by the Swiss hydrologist François-Alphonse Forel in 1890, who was the first to make scientific observations of the effect in Lake Geneva. The word had apparently long been used in the region to describe oscillations in alpine lakes. According to Wilson (1972), this Swiss French dialect word comes from the Latin word siccus meaning “dry”, i.e., as the water recedes, the beach dries. The French word sec or sèche (dry) descends from the Latin.

A dye that helps to give Doritos their orange hue can also turn mouse tissues transparent

Saturday, September 7th, 2024

A dye that helps to give Doritos their orange hue can also turn mouse tissues transparent, researchers have found:

Applying the dye to the skin of live mice allowed scientists to peer through tissues at the structures below, including blood vessels and internal organs.

[…]

The technique works by changing how body tissues that are normally opaque interact with light. The fluids, fats and proteins that make up tissues such as skin and muscle have different refractive indices (a measurement of how much a material bends light): aqueous components have low refractive indices, whereas lipids and proteins have high ones. Tissues appear opaque because the contrast between these refractive indices causes light to be scattered. The researchers speculated that adding a dye that strongly absorbs light to such tissues could narrow the gap between the components’ refractive indices enough to make them transparent.

[…]

Several candidates emerged, but the team focused on tartrazine, or FD&C Yellow 5, a common dye used in many processed foods. “When tartrazine is dissolved in water, it makes water bend light more like fats do,” says Hong. A tissue containing fluids and lipids becomes transparent when the dye is added, because the light refraction of fluids matches that of lipids.

[…]

The researchers demonstrated tartrazine’s ability to render tissues transparent on thin slivers of raw chicken breast. They then massaged the dye into various areas of a live mouse’s skin. Applying the dye to the scalp allowed the team to scrutinize tiny zigzags of blood vessels; putting it on the abdomen offered a clear view of the mouse’s intestines contracting with digestion, and revealed other movements tied to breathing. The team also used the solution on the mouse’s leg, and were able to discern muscle fibres beneath the skin.

The technique can make tissues transparent only to a depth of around 3 millimetres, so it is currently of limited practical use for thicker tissues and larger animals.

I was immediately reminded of H.G. Wells’ Invisible Man:

“But I went to work—like a slave. And I had hardly worked and thought about the matter six months before light came through one of the meshes suddenly—blindingly! I found a general principle of pigments and refraction—a formula, a geometrical expression involving four dimensions. Fools, common men, even common mathematicians, do not know anything of what some general expression may mean to the student of molecular physics. In the books—the books that tramp has hidden—there are marvels, miracles! But this was not a method, it was an idea, that might lead to a method by which it would be possible, without changing any other property of matter—except, in some instances colours—to lower the refractive index of a substance, solid or liquid, to that of air—so far as all practical purposes are concerned.”

“Phew!” said Kemp. “That’s odd! But still I don’t see quite … I can understand that thereby you could spoil a valuable stone, but personal invisibility is a far cry.”

“Precisely,” said Griffin. “But consider, visibility depends on the action of the visible bodies on light. Either a body absorbs light, or it reflects or refracts it, or does all these things. If it neither reflects nor refracts nor absorbs light, it cannot of itself be visible. You see an opaque red box, for instance, because the colour absorbs some of the light and reflects the rest, all the red part of the light, to you. If it did not absorb any particular part of the light, but reflected it all, then it would be a shining white box. Silver! A diamond box would neither absorb much of the light nor reflect much from the general surface, but just here and there where the surfaces were favourable the light would be reflected and refracted, so that you would get a brilliant appearance of flashing reflections and translucencies—a sort of skeleton of light. A glass box would not be so brilliant, nor so clearly visible, as a diamond box, because there would be less refraction and reflection. See that? From certain points of view you would see quite clearly through it. Some kinds of glass would be more visible than others, a box of flint glass would be brighter than a box of ordinary window glass. A box of very thin common glass would be hard to see in a bad light, because it would absorb hardly any light and refract and reflect very little. And if you put a sheet of common white glass in water, still more if you put it in some denser liquid than water, it would vanish almost altogether, because light passing from water to glass is only slightly refracted or reflected or indeed affected in any way. It is almost as invisible as a jet of coal gas or hydrogen is in air. And for precisely the same reason!”

“Yes,” said Kemp, “that is pretty plain sailing.”

“And here is another fact you will know to be true. If a sheet of glass is smashed, Kemp, and beaten into a powder, it becomes much more visible while it is in the air; it becomes at last an opaque white powder. This is because the powdering multiplies the surfaces of the glass at which refraction and reflection occur. In the sheet of glass there are only two surfaces; in the powder the light is reflected or refracted by each grain it passes through, and very little gets right through the powder. But if the white powdered glass is put into water, it forthwith vanishes. The powdered glass and water have much the same refractive index; that is, the light undergoes very little refraction or reflection in passing from one to the other.

“You make the glass invisible by putting it into a liquid of nearly the same refractive index; a transparent thing becomes invisible if it is put in any medium of almost the same refractive index. And if you will consider only a second, you will see also that the powder of glass might be made to vanish in air, if its refractive index could be made the same as that of air; for then there would be no refraction or reflection as the light passed from glass to air.”

“Yes, yes,” said Kemp. “But a man’s not powdered glass!”

“No,” said Griffin. “He’s more transparent!”

The bear had at least 13 adult parasitic worms pulled from its eyes

Thursday, August 22nd, 2024

Researchers have reported the first known infection of an exotic eye worm in a black bear in the US, which was killed in Pennsylvania in November 2023:

The bear had at least 13 adult parasitic worms pulled from its eyes, and the researchers identified them as the invasive, potentially blinding species Thelazia callipaeda, which was only first detected in the US in 2020.

Thelazia callipaeda adult in the eye of a cat

T. callipaeda is a nematode previously known for spreading in Asia and Eastern Europe, where it plagues carnivores, rabbits and hares, rodents, and primates (including humans). But it has recently undergone a swift and massive expansion in its range, including to Western Europe and North America. The initial 2020 detection in the US was in an eye of a pet dog in New York that had no travel history. Since then, it has shown up in at least 11 dogs — in New York, New Jersey, Connecticut, and Nevada — and two cats in New York, according to a study published in February. (The travel history of the Nevada dog is unknown, so it’s unclear where that infection occurred.)

In the new study, the UPenn researchers noted that the adult female bear with the T. callipaeda infection was “legally harvested” in Monroe County. The infection was detected as it was being processed for taxidermy. The researchers noted that two other bears harvested in the area had similar eye worm infections, but those cases were not investigated to determine the type of worms.

[…]

The worm spreads via a variegated fruit fly, Phortica variegate, that feasts on the tears and salty eye secretions of various mammals. There’s only limited data on P. variegate‘s distribution in the US. But it’s clearly an effective vector for the worm and efficient at delivering the parasite to new hosts.

The fruit fly’s role is not just to transport T. callipaeda, but also to help it grow. The life cycle of the worm starts in a host’s eye, where early-stage (L1) larvae are released by adult female worms and picked up by a male fly. The fly then becomes infected, with the larvae going through two developmental stages in the fly’s testes. When they’re ready, the third-stage (L3) larvae migrate to the fly’s mouthparts, where they can be transferred to a new host.

A fireworm sting can leave you in pain for several hours and can even cause dizziness and confusion

Wednesday, August 21st, 2024

Everything in Australia is trying to kill you, but Texas now has Australia-worthy fireworms washing up on its beaches:

They really do sound like a sci-fi or fantasy monster:

The marine creatures are also known as bristleworms because they have hair-like bristles that are hollow and full of venom, so you can probably guess how they earned their other name.

“The reason it’s called a fireworm is because when it stings you, it feels like fire,” said Jace Tunnell, director of community engagement for the HRI in a video posted to the institute’s YouTube page.

[…]

A fireworm sting can leave you in pain for several hours and can even cause dizziness and confusion.

“As far as I know they can’t kill you, which I guess is the good news,” Tunnell said.

The bristles are hollow spines that are filled with venom. They break off and embed into your skin if you brush up against them.

And if they don’t already sound terrifying enough, Tunnell said the worms can produce asexually — if you cut one in half, it will regenerate into two worms.

The savants had missed nothing

Sunday, August 18th, 2024

Napoleon by Andrew Roberts The first volume of Vivant Denon’s vast and magisterial Description de l’Égypte was published in 1809, Andrew Roberts explains (in Napoleon: A Life), its title page proclaiming that it was ‘published by the order of His Majesty Emperor Napoleon the Great’:

For the rest of Napoleon’s life, and indeed after it, further volumes of this truly extraordinary work appeared, finally numbering twenty-one and constituting a monument in the history of scholarship and publishing. The savants had missed nothing. From Cairo, Thebes, Luxor, Karnak, Aswan and all the other sites of Ancient Egyptian temples, there were immensely detailed scale drawings (20 inches by 27) in both colour and black and white of obelisks, sphinxes, hieroglyphics, cartouches, pyramids and sexually aroused pharaohs, as well as mummified birds, cats, snakes and dogs. (According to volume twelve, King Ozymandias didn’t have a ‘wrinkl’d lip and sneer of cold command’ as Shelley suggests, but a rather engaging smile.)

[…]

The savants’ greatest discovery was the Rosetta Stone, a stele in three languages found at El-Rashid in the Delta.

[…]

Under the peace agreement covering the French withdrawal in 1801, the Stone was handed over to the British and sent to the British Museum, where it still safely resides.

Tragically, the Institut near Tahrir Square in Cairo was burned down during the Arab Spring uprising on December 17, 2011, and almost all its 192,000 books, journals and other manuscripts — including the only handwritten manuscript of Denon’s Description de l’Égypte — were destroyed.

Scientists drilled the deepest core yet

Thursday, August 15th, 2024

In May of 2023, scientists drilled the deepest core yet and recovered serpentinized peridotite that forms when saltwater interacts with mantle rock:

Separating the planet’s rocky crust and the molten outer core, the mantle makes up 70 percent of the Earth’s mass and 84 percent of its volume. But despite its outsized influence on the planet’s geologic processes, scientists have never directly sampled rocks from this immensely important geologic layer.

And that’s understandable, especially when you consider that the crust is roughly 9 to 12 miles thick on average. Luckily, that average contains outliers—areas of the world where the crust is actually incredibly thin and faulting exposes the mantle through cracks. One such area is the Mid-Atlantic Ridge, specifically near an underwater mountain called the Atlantis Massif.

On the south side of this massif is an area known as the Lost City — a hydrothermal field whose vent fluids are highly alkaline and rich in hydrogen, methane, and other carbon compounds. This makes the area a particularly compelling candidate for explaining how early life evolved on Earth. Additionally, it contains mantle rock that interacts with seawater in a process known as “serpentinization,” which alters the rock’s structure and gives it a green, marble-like appearance.

It was here, 800 meters south of this field, in May of 2023 that members of the International Ocean Discovery Program (IODP) — aboard the JOIDES Resolution, a 470-foot-long research vessel rented by the U.S. National Science Foundation — extracted a 1,268-meter core containing abyssal peridotites, which are the primary rocks that make up the Earth’s upper mantle.

[…]

“We had only planned to drill for 200 meters, because that was the deepest people had ever managed to drill in mantle rock,” Johan Lissenberg, a petrologist at Cardiff University and co-author of the study, told Nature. He said that the drilling was so easy that they progressed three times faster than usual. The team eventually drilled a staggering 1,268 meters, and only stopped due to the mission’s limited operations window.

Our scientists would need to know what to look for

Tuesday, July 16th, 2024

Area 51 by Annie JacobsenJames Killian was the 10th president of the Massachusetts Institute of Technology, from 1948 until 1959, and Chair of the President’s Intelligence Advisory Board under John F. Kennedy, where, Annie Jacobsen explains (in Area 51), he organized, oversaw, and then tried to cover up the facts regarding two of the most dangerous weapons tests in the history of the nuclear bomb:

Two thermonuclear devices, called Teak and Orange, each an astonishingly powerful 3.8 megatons, were exploded in the Earth’s upper atmosphere at Johnston Atoll, 750 miles west of Hawaii. Teak went off at 252,000 feet, or 50 miles, and Orange went off at 141,000 feet, 28 miles, which is exactly where the ozone layer lies. In hindsight, it was a ludicrous idea. “The impetus for these tests was derived from the uncertainty in U.S. capability to discern Soviet high-altitude nuclear detonation,” read one classified report. Killian was in charge of the tests, and his rationale for authorizing them was that if sometime in the future the Soviets were to detonate a high-altitude nuclear bomb, our scientists would need to know what to look for.

Instead of being difficult to detect, a nuclear bomb exploding in the ozone layer was instantly obvious in horrific and catastrophic ways. The fireballs produced by both Teak and Orange burned the retinas of any living thing that had been looking up at the sky without goggles within a 225-mile radius of the blast, including hundreds of monkeys and rabbits that Killian authorized to be flown in airplanes nearby. The animals’ heads had been locked in gadgets that forced them to witness the megaton blast. From Guam to Wake Island to Maui, the natural blue sky changed to a red, white, and gray, creating an aurora 2,100 miles along the geomagnetic meridian. Radio communication throughout a swath of the Pacific region went dead.

“We almost blew a hole in the ozone layer,” explains Al O’Donnell, the EG&G weapons test engineer who in the twelve years since Crossroads had wired over one hundred nuclear bombs, including Teak and Orange. O’Donnell was standing on Johnston Island, 720 miles southwest of Honolulu, on August 1, 1958, when the Teak bomb went off. Due to a “program failure” on the Redstone missile system (which carried the warhead to its target), the rocket went straight up and detonated directly above where O’Donnell and the rest of the arming and firing party were working. The bomb was supposed to have detonated twenty-six miles to the south. In a sanitized film record of the event, men in flip-flops and shorts can be seen ducking for cover as a phenomenal fireball consumes the sky overhead. “It was scary,” O’Donnell sighs, remembering the catastrophic event as an old man, half a century later. There is a hint of resignation in his voice when he says, “But we were all used to it by then. The bombs had become too big.” In Teak’s first ten milliseconds, its fireball grew ten miles wide—enough yield to obliterate Manhattan. At H + 1 second, the fireball was more than forty miles wide, which could have taken out all five boroughs of New York City.

[…]

Killian’s high-altitude nuclear tests did not stop there. Two weeks later, another ultrasecret nuclear weapons project called Operation Argus commenced. Killian’s nuclear bomb tests had now expanded to include outer space.

[…]

On August 27, August 30, and September 6, 1958, three nuclear warheads were launched from X-17 rockets from the deck of the USS Norton Sound as the warship floated off the coast of South Africa in the South Atlantic Ocean. Up went the missiles and the warheads until they exploded approximately three hundred miles into space. This “scientific experiment” was the brainchild of a Greek elevator operator turned physicist, Nicholas Christofilos. Christofilos convinced Killian that a nuclear explosion occurring above the Earth’s atmosphere—but within the Earth’s magnetic field—might produce an electronic pulse that could hypothetically damage the arming devices on Soviet ICBM warheads trying to make their way into the United States. While the phenomenon did occur in minutiae, meaning the arming devices registered “feeling” the pulse from the nuclear blast, Christofilos was wrong about the possibility that this would actually stop incoming enemy nuclear missiles in their tracks.

[…]

On October 30, 1961, the Soviet Union detonated the largest, most powerful nuclear weapon the world had ever known. Called the Tsar Bomba, the hydrogen bomb had an unbelievable yield of fifty megatons, roughly ten times the amount of all the explosives used in seven years of war during World War II, including both nuclear bombs dropped on Hiroshima and Nagasaki. Tsar Bomba, detonated over northern Russia, flattened entire villages in surrounding areas and broke windows a thousand miles away in Finland. Anyone within a four-hundred-mile radius who was staring at the blast would have gone blind. Soviet leader Nikita Khrushchev told the United Nations Assembly that the purpose of the test was to “show somebody Kuzka’s mother”—to show somebody who’s boss.

The trichomes stay in the skin for up to a year

Saturday, June 29th, 2024

Back before he came up with the easier-to-film Survivor, Mark Burnett produced the Eco-Challenge adventure race, based on Gerald Fusil’s Raid Gauloises adventure race in Costa Rica:

The teams raced non-stop, 24 hours a day, over a rugged 300-mile (500 km) course, participating in such disciplines as trekking, whitewater canoeing, horseback riding, sea kayaking, scuba diving, mountaineering, camel-back riding, and mountain biking. Teams originally consisted of five members, but the team size was reduced to four members early in the event’s history. A feature of the race is the mandatory mix of men and women for all participating teams.

I vividly remember watching the 1997 Australia race, when a bickering team mountain-biking through the rainforest at night, with headlamps on, stopped, because one of the guys screamed out in pain. He didn’t know what had happened, but his best guess was that a snake had bit him, or perhaps some other venomous creature. The team asked if he could go on, because he wasn’t going to get any help until they reached the aid station.

When they got to the aid station, the medic took a look and found no bite, but he did find some nettles from the gympie-gympie bush. What could they do about the excruciating pain? Nothing. How long would the pain last? Months.

Everything in Australia is trying to kill you.

He kept racing.

Other people have not kept going:

North Queensland road surveyor A.C. Macmillan was among the first to document the effects of a stinging tree, reporting to his boss in 1866 that his packhorse “was stung, got mad, and died within two hours”. Similar tales abound in local folklore of horses jumping in agony off cliffs and forestry workers drinking themselves silly to dull the intractable pain.

Writing to Marina in 1994, Australian ex-serviceman Cyril Bromley described falling into a stinging tree during military training on the tableland in World War II. Strapped to a hospital bed for three weeks and administered all manner of unsuccessful treatments, he was sent “as mad as a cut snake” by the pain. Cyril also told of an officer shooting himself after using a stinging-tree leaf for “toilet purposes”.

He’s had too many stings to count but Ernie Rider will never forget the day in 1963 that he was slapped in the face, arms and chest by a stinging tree. “I remember it feeling like there were giant hands trying to squash my chest,” he said. “For two or three days the pain was almost unbearable; I couldn’t work or sleep, then it was pretty bad pain for another fortnight or so. The stinging persisted for two years and recurred every time I had a cold shower.”

Now a senior conservation officer with the Queensland Parks and Wildlife Service, Ernie said he’s not experienced anything like the pain during 44 years work in the bush. “There’s nothing to rival it; it’s 10 times worse than anything else – scrub ticks, scrub itch and itchy-jack sting included. Stinging trees are a real and present danger.”

So swollen was Les Moore after being stung across the face several years ago that he said he resembled Mr Potato Head.

“I think I went into anaphylactic shock and it took days for my sight to recover,” said Les, a scientific officer with the CSIRO Division of Wildlife and Ecology in Queensland, who was near Bartle Frere (North Peak) studying cassowaries when disaster struck.

“Within minutes the initial stinging and burning intensified and the pain in my eyes was like someone had poured acid on them. My mouth and tongue swelled up so much that I had trouble breathing. It was debilitating and I had to blunder my way out of the bush.”

Wikipedia explains the mechanism:

Very fine, brittle hairs called trichomes are loaded with toxins and cover the entire plant; even the slightest touch will embed them in the skin. Electron micrograph images show that they are similar to a hypodermic needle in being very sharp-pointed and hollow. Additionally, it has been shown that there is a structurally weak point near the tip of the hair, which acts as a pre-set fracture line. When it enters the skin the hair fractures at this point, allowing the contents of the trichome to be injected into the victim’s tissues.

The trichomes stay in the skin for up to a year, and release the toxin cocktail into the body during triggering events such as touching the affected area, contact with water, or temperature changes.

I was reminded of this by the recent story of a hiker who suddenly lost feeling in her legs from a mysterious attacker in California’s Sierra Nevada mountains:

The woman had stopped around 6:30 p.m. to fetch water from a creek along the park’s Taboose Pass when she felt a sting that she thought was a spider bite.

“Afterwards, she was unable to feel the skin on her legs and could not continue her hike down,” Inyo County Search & Rescue officials said in a statement.

The unidentified woman used the last of her phone battery’s juice to call for help. She relayed her coordinates just before the device died.

The Inyo County Search & Rescue pushed a wheeled litter the 1.75 miles between the trailhead and the immobilized hiker — but came just a quarter mile short of the victim when the trail became too rough.

The team stashed the litter and forged ahead until they found the paralyzed woman, who they “slowly walked down the tricky section of the trail while ensuring her safety with ropes.”

The entire rescue operation took more than five hours.

In the days after the scary encounter, medical officials ruled that the bite wasn’t from a spider at all — nor was it even a bite.

“Rescuers believe that the individual who needed rescuing was stung by stinging nettles located on the overgrown trail,” Lindsey Stine of the county sheriff’s office told The Post.

Fortunately, the symptoms from California’s stinging nettles don’t last longer than 24 hours.

The Russians took great delight in rubbing what they learned in the face of the State Department

Tuesday, June 4th, 2024

Area 51 by Annie JacobsenWhile developing the A-12 Oxcart, which would evolve into the SR-71, Annie Jacobsen explains (in Area 51), the CIA feared the Russians were watching from space:

Across the world, at NII-88, Sergei Korolev had designed a Soviet spy satellite called Object D, but the CIA did not know what exactly it was capable of. Also under way was a follow-on espionage platform called Zenit, a modified version of the Vostok spacecraft that had been equipped with cameras to photograph American military installations from space. The Russians took great delight in rubbing what they learned in the face of the State Department. Once, using diplomatic channels, they passed a simple sketch of the exact shape of Lockheed’s top secret airplane to the CIA, whose employees were baffled as to how the enemy could have known such a thing, in view of the fact that operations personnel had been very careful to avoid the orbiting Soviet snoopers. Was there a double agent among them? The CIA, ever paranoid about KGB infiltration, worried in private that there could be a spy inside Area 51. Lovick finally figured it out: the Russians were using infrared satellites. In the desert heat, which could reach 125 degrees Fahrenheit in the summer, the mock-up of the aircraft left a heat signature as it sat on the tarmac while technicians were waiting to hoist it up on the test pole. The sketch reflected that.

Internal Family Systems is the hot new psychotherapy

Thursday, May 23rd, 2024

The Others Within Us by Robert FalconerInternal Family Systems, Scott Alexander explains, is the hot new psychotherapy:

The therapy that’s getting all the buzz, curing all the incurable patients, rocking those first few small studies. The therapy that was invented by a grizzled veteran therapist working with Patients Like You, not the out-of-touch elites behind all the other therapies. The therapy that Really Gets To The Root Of The Problem. There’s always got to be one, and now it’s IFS.

[…]

You treat your mind as containing a Self — a sort of perfect angelic intellect without any flaws or mental illnesses — and various Parts — little sub-minds with their own agendas who can sometimes occlude or overwhelm the Self. During therapy, you talk to the Parts, learn their motives, and bargain with them.

[…]

The second assumption is that everything inside your mind is part of you, and everything inside your mind is good.

[…]

The secret is: no, actually some of these things are literal demons.

At least this is what I take from The Others Within Us, by Robert Falconer, a veteran IFS therapist.

[…]

The first N times they ran into this kind of thing, the IFS therapists said that surely this was some good-albeit-traumatized Part of the patient’s unconscious, which had spun a crazy metaphorical story and needed to be bargained with and brought back to the Self. But it kept happening. The demons’ stories were surprisingly consistent. Finally, some of the IFS therapists would tell their therapist friends — look, this sounds crazy, but sometimes it seems like some of our patients have demons.

And the therapist friends would answer: “Oh, you too?”

[…]

To hear Falconer tell it, one of psychotherapy’s big crises is that veteran therapists and psychiatrists keep noticing the demons, keep talking about it in their isolated silos, but nobody’s ever blown the lid off the whole thing and made it public.

(And it’s not just therapists. One of my favorite stories in the book was that of Reverend John Nevius, a sober-minded Protestant missionary in late 1800s China. He learned that the Chinese mostly appreciated Christianity for its ability to cast out demons, and that they expected his help with this task. After great reluctance, he agreed, and was surprised to find himself effecting miracle cures and winning converts. “After experiencing casting out demons himself, he sent circular letters to all the other missionaries in China, almost all of whom had similar experiences. Seventy percent of them had come to believe in possession and re-evaluate their faith.”)

[…]

He also falls into a trap I would describe as “has never read a pseudoscience book before, doesn’t realize what the red flags for pseudoscience are, and so collects the whole set”. We go from discussion on how the same doctors who laughed at Ignatz Semmelweiss will no doubt laugh at him, to quotes about science progressing funeral by funeral, to that one story about how the Native Americans couldn’t even see Columbus’ ships because they were so far out of their accepted categorization schemes3. These are all prima facie reasonable things to mention if you have a revolutionary theory that you expect the establishment to reject. But it’s analogous to how, if you’ve just been accused of racism, it prima facie seems reasonable to object that you have lots of black friends. Along with prima facie reasonableness, you also benefit from having some familiarity with the discourse and avoiding the exact phrases that will make doubters maximally hostile.

[…]

In the “multiple personalities panic” of the 1980s, some psychologists started thinking multiple personality disorder was a big thing and suggesting to all their traumatized borderline female patients that they might have it. Sure enough, lots of these people developed multiple personalities. This didn’t seem fake, just weird. Eventually the American Psychiatric Association sent out a statement saying “STOP DOING THIS”, therapists stopped talking about multiple personalities with their traumatized borderline female patients, and these people mostly stopped getting multiple personality disorder (although the occasional new case crops up here and there).

Now here comes IFS, saying “hey maybe you have multiple Parts in your mind, have you considered looking for them?”

As a last step, he fully covered the wound with the chewed leaves

Saturday, May 4th, 2024

There is widespread evidence of such self-medication in non-human animals — whole-leaf swallowing, bitter-pith chewing, and fur rubbing in African great apes, orangutans, white handed gibbons, and several other species of monkeys — but there had been only one report of active wound treatment in non-human animals, namely in chimpanzees, until scientists spotted the active self-treatment of a facial wound with a biologically active plant by a male Sumatran orangutan:

We observed a male Sumatran orangutan (Pongo abelii) who sustained a facial wound. Three days after the injury he selectively ripped off leaves of a liana with the common name Akar Kuning (Fibraurea tinctoria), chewed on them, and then repeatedly applied the resulting juice onto the facial wound. As a last step, he fully covered the wound with the chewed leaves. Found in tropical forests of Southeast Asia, this and related liana species are known for their analgesic, antipyretic, and diuretic effects and are used in traditional medicine to treat various diseases, such as dysentery, diabetes, and malaria. Previous analyses of plant chemical compounds show the presence of furanoditerpenoids and protoberberine alkaloids, which are known to have antibacterial, anti-inflammatory, anti-fungal, antioxidant, and other biological activities of relevance to wound healing. This possibly innovative behavior presents the first systematically documented case of active wound treatment with a plant species know to contain biologically active substances by a wild animal and provides new insights into the origins of human wound care.

Orangutan Facial Wound Healing

Chickenpox is now so rare in the US that doctors are misdiagnosing it half the time

Thursday, March 28th, 2024

Thanks to a successful vaccination campaign starting in 1995, chickenpox is now so rare in the US that doctors are misdiagnosing it half the time, according to a report from the Minnesota Department of Health:

The country’s nationwide childhood vaccination effort reduced case numbers, hospitalizations and deaths in under 20-year-olds by more than 97 percent.

[…]

Some people who have been vaccinated against chickenpox can still get the disease, usually with milder fevers and fewer or no blisters, just red spots. This occurs more often in people who’ve only had one dose of the vaccine, not the recommended two.

Since the milder-looking ‘breakthrough’ chickenpox looks different to what doctors might be expecting of the once-rampant childhood disease, it can be difficult to diagnose just by looking at the red rash or spots.

[…]

The investigation found that of 420 patients with a suspected chickenpox infection who provided specimens to MDH’s labs between December 2016 and March 2023, only 37 percent tested positive for varicella-zoster — the virus that causes chickenpox.

One-fifth of those positive cases were examples of ‘breakthrough’ chickenpox, having received at least one dose of the chickenpox vaccine, and around half of the patients tested by MDH were fully or partially vaccinated.

More specifically, among 208 patients whose doctors suspected they had chickenpox after examining them at a medical facility, only 45 percent (or 95 people) tested positive for the disease. Another 26 people tested positive for an enterovirus, and a sole person was found to have HSV-1, a different type of herpes virus related to chickenpox.

At first, they thought it was blood from one of the sperm whales

Saturday, March 23rd, 2024

During a tourist excursion in Bremer Canyon, a whale-watching hotspot off the coast between Albany and Hopetoun, scientists witnessed a pod of sperm whales forming a “rosette” — that is, forming a circle with their heads together — as orcas attacked, before unleashing their defense defecation:

They described seeing a “cloud of diarrhea” permeate the water, and this rarely seen defense mechanism seemed to help the sperm whale pod escape what could have been a fatal attack by at least 30 killer whales, ABC News Australia reported.

[…]

As the event unfolded, onlookers noticed a large, “dark bubble” pop up to the water’s surface. At first, they thought it was blood from one of the sperm whales, potentially a small calf. But when the team later reviewed footage of the plume, they realized it was actually whale poop.

“Because [a] sperm whale’s diet consists mostly of squid, they actually have this really reddish colored poo,” she said.

Space radiation comes in two different flavors

Saturday, March 16th, 2024

The Orion spacecraft that is supposed to take humans on a Moon fly-by mission this year has a heavily shielded (solar) storm shelter for the crew, but shelters like that aren’t sufficient for a flight to Mars:

Space radiation comes in two different flavors. Solar events like flares or coronal mass ejections can cause very high fluxes of charged particles (mostly protons). They’re nasty when you have no shelter but are relatively easy to shield against since solar protons are mostly low energy. The majority of solar particle events flux is between 30 Mega-electronVolts to 100 MeV and could be stopped by Orion-like shelters.

Then there are galactic cosmic rays: particles coming from outside the Solar System, set in motion by faraway supernovas or neutron stars. These are relatively rare but are coming at you all the time from all directions. They also have high energies, starting at 200 MeV and going to several GeVs, which makes them extremely penetrating. Thick masses don’t provide much shielding against them. When high-energy cosmic ray particles hit thin shields, they produce many lower-energy particles—you’d be better off with no shield at all.

The particles with energies between 70 MeV and 500 MeV are responsible for 95 percent of the radiation dose that astronauts get in space. On short flights, solar storms are the main concern because they can be quite violent and do lots of damage very quickly. The longer you fly, though, GCRs become more of an issue because their dose accumulates over time, and they can go through pretty much everything we try to put in their way.

The reason nearly none of this radiation can reach us is that Earth has a natural, multi-stage shielding system. It begins with its magnetic field, which deflects most of the incoming particles toward the poles. A charged particle in a magnetic field follows a curve—the stronger the field, the tighter the curve. Earth’s magnetic field is very weak and barely bends incoming particles, but it is huge, extending thousands of kilometers into space.

Anything that makes it through the magnetic field runs into the atmosphere, which, when it comes to shielding, is the equivalent of an aluminum wall that’s 3 meters thick. Finally, there is the planet itself, which essentially cuts the radiation in half since you always have 6.5 billion trillion tons of rock shielding you from the bottom.

To put that in perspective, the Apollo crew module had on average 5 grams of mass per square centimeter standing between the crew and radiation. A typical ISS module has twice that, about 10 g/cm2. The Orion shelter has 35–45 g/cm2, depending on where you sit exactly, and it weighs 36 tons. On Earth, the atmosphere alone gives you 810 g/cm2—roughly 20 times more than our best shielded spaceships.

The two options are to add more mass—which gets expensive quickly—or to shorten the length of the mission, which isn’t always possible. So solving radiation with passive mass won’t cut it for longer missions, even using the best shielding materials like polyethylene or water. This is why making a miniaturized, portable version of the Earth’s magnetic field was on the table from the first days of space exploration. Unfortunately, we discovered it was far easier said than done.

[…]

In 1967, Richard H. Levy and Francis W. French delivered a report saying that plasma and electrostatic shields were promising, but they both needed 60 million volts to work—even by today’s standards, that number is ridiculous.

[…]

Electrostatic shields had been ignored because they required those 60 million volts that French and Levy talked about in their report. In 2008, NASA’s Kennedy Space Center and ASRC Aerospace Corporation proposed an electrostatic shield based on three huge Van de Graaff generators connected to an outer ring that looked like something taken straight from a Vulcan Combat Cruiser. It was undeniably cool, but it was completely infeasible. Fry and Madzunkov had to find something more realistic, so they turned to advanced modeling software and huge GPU clusters.

[…]

events’ radiation and 15 percent of cosmic rays using just 1 million volts, not 60 million. And you no longer needed to haul a full-size power plant with you. “Using grid-like, porous structures we not only brought the weight down, but we also brought the needed power down from megawatts to 100 watts,” said Fry. Power savings that big were possible because plasmas, which normally bleed away volts, did not accumulate on these porous structures—they flew right through them.