Episode 348: Australopithecus and Gigantopithecus

Thanks to Anbo for suggesting Australopithecus! We’ll also learn about Gigantopithecus and Bigfoot!

Further reading:

Ancient human relative, Australopithecus sediba, ‘walked like a human, but climbed like an ape’

Human shoulders and elbows first evolved as brakes for climbing apes

You Won’t Believe What Porcupines Eat

Past tropical forest changes drove megafauna and hominin extinctions

An Australopithecus skeleton [photo by Emőke Dénes – kindly granted by the author, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=78612761]:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

It’s officially monster month, also known as October, so let’s jump right in with a topic suggested by Anbo! Anbo wanted to learn about Australopithecus, and while we’re at it we’re going to talk about Gigantopithecus and Bigfoot. On our spookiness rating scale of one to five bats, where one bat means it’s not a very spooky episode and five bats means it’s really spooky, this one is going to fall at about two bats, and only because we talk a little bit about the Yeti and Bigfoot at the end.

In 1924 in South Africa, the partial skull of a young primate was discovered. Primates include monkeys and apes along with humans, our very own family tree. This particular fossil was over a million years old and had features that suggested it was an early human ancestor, or otherwise very closely related to humans.

The fossil was named Australopithecus, which means “southern ape.” Since 1924 we’ve discovered more remains, enough that currently, seven species of Australopithecus are recognized. The oldest dates to a bit over 4 million years old and was discovered in eastern Africa.

Australopithecus was probably pretty short compared to most modern humans, although they were probably about the size of modern chimpanzees. A big male might have stood about 4 ½ feet tall, or 1.5 meters. They were bipedal, meaning they would have stood and walked upright all the time. That’s the biggest hint that they were closely related to humans. Other great apes can walk upright if they want, but only humans and our closest ancestors are fully bipedal.

In 2008 a palaeoanthropologist named Lee Rogers Berger took his nine-year-old son Matthew to Malapa Cave in South Africa. Dr. Berger was leading an excavation of the cave and Matthew wanted to see it. While he was there, Matthew noticed something that even his father had overlooked. It turned out to be a collarbone belonging to an Australopithecus boy who lived almost 2 million years ago. Later, Dr Berger’s team uncovered more of the skeleton and determined that the remains belonged to a new species of Australopithecus, which they named Australopithecus sediba. More remains of this species were discovered later, including a beautifully preserved lower back. That discovery was important because it allowed scientists to determine that this species of Australopithecus had already evolved the inward curve in the lower back that humans still have, which helps us walk on two legs more easily. That was a surprise, since A. sediba also still shows features that indicate they could still climb trees like a great ape.

It’s possible that Australopithecus, along with other species of early humans, climbed trees at night to stay safe from predators. In the morning, they climbed down to spend the day mostly on the ground. One study published only a few weeks ago as this episode goes live suggests that the flexible shoulders and elbows that humans share with our great ape cousins originally evolved to help apes climb down from trees safely. Monkeys don’t share our flexible shoulder and elbow joints because they’re much lighter weight than a human or ape, and don’t need as much flexibility to keep from falling while climbing down. Apes and hominins like humans can raise our arms straight up over our heads, and we can straighten our arms out completely flat. Australopithecus could do the same. The study suggests that when another human ancestor, Homo erectus, figured out how to use fire, they stopped needing to climb trees so often. They evolved broader shoulders that allowed them to throw spears and other weapons much more accurately.

Australopithecus probably mostly ate fruit and other plant materials like vegetables and nuts, along with small animals that they could catch fairly easily. This is similar to the diet of many great apes today. The big controversy, though, is whether Australopithecus made and used tools. Their hands would have been more like the hands of a bonobo or chimpanzee, which have a lot of dexterity, but not the really high-level dexterity of modern humans and our closest ancestors. Stone tools have been found in the same areas where Australopithecus fossils have been found, but we don’t have any definitive proof that they made or used the tools. There were other early hominins living in the area who might have made the tools instead.

We also don’t really know what Australopithecus looked like. Some scientists think they had a lot of body hair that would have made them look more like apes than early humans, while some scientists think they had already started losing a lot of body hair and would have looked more human-like as a result.

There’s no question these days that Australopithecus was an early human ancestor. We don’t have very many remains, but we do have several skulls and some nearly complete skeletons, which tells us a lot about how our distant ancestor lived. But we know a lot less about a fossil ape that lived as recently as 350,000 years ago, and it’s become confused with modern stories of Bigfoot.

Gigantopithecus first appears in the fossil record about 2 million years ago. It lived in what is now southern China, although it was probably also present in other parts of Asia. It was first discovered in 1935 when an anthropologist identified two teeth as belonging to an unknown species of ape, and since then scientists have found over a thousand teeth and four jawbones, more properly called mandibles.

The problem is that we don’t have any other Gigantopithecus bones. We don’t have a skull or any parts of the body. All we have are a few mandibles and lots and lots of teeth. The reason we have so many teeth is because Gigantopithecus had massive molars, the biggest of any known species of ape, with a protective layer of enamel that was as much as 6 mm thick. Some of the teeth were almost an inch across, or 22 mm. A lot of the remaining bones were probably eaten by porcupines, and in fact the mandibles discovered show evidence of being gnawed on. This sounds bizarre, but porcupines are well-known to eat old bones along with the shed antlers of deer, which supplies them with important nutrients. The teeth were too hard for the porcupines to eat.

We know that Gigantopithecus was a big ape just from the size of its mandible, but without any other bones we can only guess at how big it really was. It was potentially much bigger and taller than even the biggest gorilla, but maybe it had a great big jaw but short legs and it just sat around and ate plants all the time. We just don’t know.

What we do know is that its massive jaw and teeth were adapted for eating fibrous plant material, not meat. The thick enamel would help protect the teeth from grit and dirt, which suggested it ate tubers and roots that would have had a lot of dirt on them, although its diet was probably more varied. Scientists have even discovered traces of seeds from fruits belonging to the fig family stuck in some of the fossilized teeth, and evidence of tooth cavities that would have resulted from eating a lot of fruit long before toothpaste was invented.

Many scientists thought at first that Gigantopithecus was a human ancestor, but one that grew to gigantic size. It was even thought to be a close relation to Australopithecus. Other scientists argued that Gigantopithecus was more closely related to modern great apes like the orangutan. The debate on where Gigantopithecus should be classified in the ape and human family tree happened to overlap with another debate about a giant ape-like creature, the Yeti of Asia and the Bigfoot of North America.

We talked about the Yeti way back in episode 35, our very first monster month episode in 2017. Expeditions by European explorers to summit Mount Everest, which is on the border between China and Nepal, started in 1921. That first expedition found tracks in the snow resembling a bare human foot at an elevation of 20,000 feet, or 6,100 meters. They realized the tracks were probably made by wolves, with the front and rear tracks overlapping, which only looked human-like after the snow melted enough to obscure the paw pads. Expedition leader Charles Howard-Bury wrote in a London Times article that the expedition’s Sherpa guides claimed the tracks were made by a wild hairy man, but he also made it clear that this was just a superstition. But journalists loved the idea of a mysterious wild man living on Mount Everest. One journalist in particular, Henry Newman, interviewed the guides and specifically asked them about the creature. He wrote a sensational account of the wild man, but he mistranslated their term for it as the abominable snowman.

The word Yeti comes from a Sherpa term yeh-teh, meaning “animal of rocky places,” although it may be related to the term meh-teh, which means man-bear. But the peoples who live in and around the Himalayas belong to different cultures and speak a lot of different languages. There are lots of stories about the hairy wild man of the mountains, and lots of different words to describe the creature of those stories. And the idea of the Yeti that has become popular in Europe and North America doesn’t match up with the local stories. Locals describe the Yeti as brown, black, or even reddish in color, not white, and it doesn’t always have human-like characteristics. Sometimes it’s described as bear-like, panther-like, or just a general monster.

The abominable snowman, or Yeti, became popular in newspaper articles after the 1921 Mount Everest expedition, and it continued to be a topic of interest as expeditions kept attempting to summit the mountain. It wasn’t until May 26, 1953 that the first humans reached the tippy-top of Mount Everest, the New Zealand explorer Edmund Hillary and the Nepali Sherpa climber Tenzing Norgay. Many other successful expeditions followed, including some that were mounted specifically to search for the Yeti.

In the meantime, across the planet in North America, a Canadian schoolteacher and government agent named John W. Burns was collecting reports of hairy wild men and giants from the native peoples in British Columbia. He’s the one who coined the term Sasquatch in 1929. In the 1930s, a man in Washington state in the U.S, which is close to British Columbia, Canada, carved some giant feet out of wood and made tracks with them in a national forest to scare people, leading to a whole spate of big human-like tracks being faked in California and other places. But it wasn’t until 1982 that the hoaxes started to be revealed as the perpetrators got old and decided to clear up the mystery.

But in the 1920s and later, the popularity of the abominable snowman in popular media, giant gorillas like King Kong in the movies, the Yeti expeditions in the Himalayas, the mysterious giant footprints on the west coast of North America, and John Burns’s articles about the Sasquatch all combined to make Bigfoot, a catchall term for any giant human-like monster, a modern legend. People who believed that Bigfoot was a real creature started looking for evidence of its existence beyond footprints and reports of sightings. In 1960, a zoologist writing about a photograph of supposed Yeti tracks taken in 1951 suggested that the Yeti might be related to Gigantopithecus.

On the surface this actually makes sense. The Yeti, AKA the abominable snowman, is reported in the Himalayan Mountains of Asia. The mountain range started forming 40 to 50 million years ago when the Indian tectonic plate crashed into the Eurasian plate very slowly, pushing its way under the Eurasian plate and scrunching the land up into massively huge mountains. It’s still moving, by the way, and the Himalayas get about 5 mm taller every year. The eastern section of the Himalayas isn’t that far from where Gigantopithecus remains have been found in China, and we also know that at many times in the earth’s recent past, eastern Asia and western North America were connected by the land bridge Beringia. Humans and many animals crossed Beringia to reach North America, so why not Gigantopithecus or its descendants? That would explain why Bigfoot is so big, since in 1957 one scientist estimated that Gigantopithecus might have stood up to 12 feet tall, or 3.7 meters.

Some people still think Gigantopithecus was a cousin of Australopithecus, that it walked upright but was huge, and that its descendants are still around today, hiding in remote areas and only glimpsed occasionally. But people who believe such an idea are stuck in the past, because in the last 60 years we’ve learned a whole lot more about Gigantopithecus.

These days, more sophisticated study of Gigantopithecus fossils have allowed scientists to classify it as a great ape ancestor, not an early human. Gigantopithecus was probably most closely related to modern orangutans, in fact, and may have shared a lot of traits with orangutans. It probably could walk upright if it wanted to, but it wasn’t fully bipedal the way humans and human ancestors are. One theory prevalent in 2017 when we talked about the Yeti before was that Gigantopithecus mostly ate bamboo and might have gone extinct when the giant panda started competing with its food sources. This theory has already fallen out of favor, though, and we know that Gigantopithecus was eating a much more varied diet than just bamboo.

We also know that Gigantopithecus lived in tropical broadleaf forests common throughout southern Asia at the time. About a million years ago, though, many of these forests became grasslands. Gigantopithecus probably went extinct as a direct result of its forest home vanishing. It just couldn’t find enough food and shelter on open grasslands, and even though it held on for hundreds of thousands of years, by about 350,000 years ago it had gone extinct. Around 100,000 years ago the forests started reclaiming much of these grasslands, but by then it was too late for Gigantopithecus. Meanwhile, the oldest evidence we have of the land bridge Beringia joining Asia and North America was 70,000 years ago.

There is no evidence that any Gigantopithecus descendant survived to populate the Himalayas or migrated into North America. For that matter, there’s no evidence that Bigfoot actually exists. If a live or dead Bigfoot is discovered and studied by scientists, that would definitely change a lot of things, and would be really, really exciting. But even if that happened, I’m pretty sure we’d find that Bigfoot wasn’t related to Gigantopithecus. Whether it would be related to Australopithecus and us humans is another thing, and that would be pretty awesome. But first, we have to find evidence that isn’t just some footprints in the mud or snow.

Some Bigfoot enthusiasts suggest that the reason we haven’t found any Bigfoot remains is the same reason why we don’t have Gigantopithecus bones, because porcupines eat them. But while porcupines do eat old dry bones they find, they don’t eat fresh bones and they don’t eat all the bones they find. For any bone to fossilize is rare, so the more bones that are around, the more likely that one or more of them will end up preserved as fossils. Bones of modern animals are much easier to find, porcupines or no, but we don’t have any Bigfoot bones. We don’t even have any Bigfoot teeth, which porcupines don’t eat.

Porcupines can be blamed for a lot of things, like chewing on people’s cars and houses, but you can’t blame them for eating up all the evidence for Bigfoot.

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Thanks for listening!

Episode 035: The Yeti (Bigfoot part 1)

It’s October, MONSTER MONTH! We’re starting it off right with an episode about the Yeti! I literally could have made this episode an hour long without even touching on half the information out there, but no one wants to listen to me talk for that long. If you’re intrigued and want to hear more about our big furry friend from the Himalayas, check out the fine podcasts listed below.

The Himalayas, in map form:

A Himalayan brown bear (tongue blep alert!):

A bear standing up (this is a brown bear from Alaska but I like the picture. Bears stand up a lot):

Recommended listening:

Museum of Natural Mystery – episode 14: “Backtracking with Bigfoot” – highly recommended for information about North American bigfoot/Sasquatch lore and history. It’s family friendly and not very long. I heart it.

MonsterTalk – episode 116 “Yetipalooza” – lots of Yeti information and some terrible, terrible puns

Strange Matters Podcast – “Legendary Humanoid Creatures” – a good overview of a lot of different bigfoot type monsters, including the Yeti

Hidden Creatures Podcast – Episode Six A “Yearning for the Yeti’s Discovery” and Episode Six B “The Yeti…Again” – lots of info on the Yeti

All of the above should be family friendly, with possible mild language.

Resources/further reading:

The Historical Bigfoot by Chad Arment

Abominable Science! by Daniel Loxton and Donald R. Prothero

Hunting Monsters by Darren Naish

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

It’s October and that means monsters. Let’s jump right in with one of the biggest stars of cryptozoology, bigfoot!

As part of my research for this episode, I listened to other podcasts that have covered bigfoot and his kin. One of those was the Museum of Natural Mystery’s episode 14, Backtracking with Bigfoot. I was more than a little dismayed when I listened to that one, because it’s exactly what I had hoped to do with this episode. In fact, while Museum of Natural Mystery covers other topics than just animals, when they do focus on animals they scratch the same itch I created Strange Animals podcast to scratch. If I’d discovered them earlier, the podcast you’re listening to now would probably be about music or something, not animals.

There’s a link to Backtracking with Bigfoot in the show notes and I highly recommend you go listen to it. It focuses mainly on the Bigfoot phenomenon in North America, from Sasquatch to skunk apes. Rather than cover the same ground, my focus here is going to be on bigfoot legends from other parts of the world. There’s so much fascinating information out there that I had to break the episode into two parts. This week we’re looking at the yeti.

But first, some background. There are a couple of starting places for the modern concept of bigfoot. In 1921, the Everest Reconnaissance Expedition found tracks in the snow resembling a bare human foot. They realized the tracks were probably made by wolves, the front and rear tracks overlapping and the snow melted enough to obscure the paw pads. Expedition leader Charles Howard-Bury wrote that the expedition’s Sherpa guides claimed the tracks were made by a wild hairy man.

At about the same time, the 1920s, British Columbian schoolteacher John W. Burns was collecting reports of Native encounters with giant wild people. He coined the term Sasquatch by anglicizing a couple of different words from several different Native dialects.

Burns published his stories in magazines. Howard-Bury talked to reporters about his Everest expedition. The idea of bigfoot took shape and took off in the public imagination. It merged with giant apes and ape-men in popular culture, like King Kong in 1933 and the movie Tarzan the Ape Man in 1932, both of which were huge hits.

Before this, from the early 19th century to around the 1940s, newspaper reports that would today be called bigfoot sightings were attributed to wild men or occasionally to escaped gorillas or other apes. Some were hoaxes, some seem to concern real humans living outside of society, and some are probably misidentifications of bears and other real animals. Very few suggest the wild man in question was a creature unknown to science. This doesn’t mean there aren’t any legit sightings of an actual bigfoot mixed in, just that bigfoot wasn’t yet a common concept.

But by 1967, year of the famous Patterson-Gimlin film, the notion of bigfoot as a huge, hairy, upright ape was firmly planted in western culture. Most of us know a fair amount about North American Sasquatches just from popular culture. ‘Squatch-hunters on TV stumble around in the woods at night, which by the way I never understood since apes are not nocturnal. Bigfoot appears in TV commercials, movies, and is the subject of documentaries that are all pretty much identical. But most of us are less familiar with the Yeti.

The English-speaking world first learned about the Yeti after a 1921 expedition to Mount Everest. As I mentioned a few minutes ago, the expedition members recognized that a line of huge human-like prints they spotted in the snow above 20,000 feet probably belonged to wolves or some other four-legged animal. The forepaw and hind paw prints overlapped, making a double track of what looked like long, relatively narrow footprints. Then the snow partially melted, obscuring the details and enlarging the prints. Colonel Howard-Bury, the expedition leader, was very clear about this in the London Times in October 1921, and dismissed as superstition the Sherpas’ statement that the tracks belonged to a hairy wild man.

Maybe all that was true, but if you’re a journalist hoping to sell papers, which story are you going to run with? After the expedition returned to India, journalist Henry Newman interviewed the porters and published a sensational account of their stories. He translated their name for the wild man, Metoh kangmi, as “abominable snowman.” Maybe you’ve heard of it.

As it turns out, Metoh kangmi means something closer to man-bear. In fact, it means man-bear, man-bear, because both mi-te and kangmi mean the same thing.

The peoples who live in and around the Himalayas speak a lot of different languages. They also have a lot of different names for what we call the Yeti. Yeti is a corruption of a Sherpa term, yeh-teh, meaning “animal of rocky places,” although it may be related to the term meh-teh, which means man-bear. Other terms translate to wild man, cattle bear, brown bear, and white bear. I’m going to refer to all these creatures as the Yeti for convenience sake.

While the pop culture version of the Yeti is a white bigfoot striding through the snow, actual sightings of Yetis are of brown, black, or even reddish creatures. Local Yeti lore throughout the Himalayas doesn’t describe a specifically upright apeman or even a particularly human-like monster, either. To locals, yetis are fairly amorphous, and when they are described, they tend to have bear-like or even big-cat-like characteristics.

As an example, here’s a quote from one of the earliest Yeti reports, from 1889. I’m taking the quote from the book Abominable Science by Daniel Loxton and Donald Prothero. Links to all the books I used in my research are in the show notes, of course. Anyway, the quote itself comes from a book called Among the Himalayas by Laurence A. Waddell:

“Some large footprints in the snow led across our track, and away up to higher peaks. These are alleged to be the trail of the hairy wild men who are believed to live amongst the eternal snows, along with the mythical white lions, whose roar is reputed to be heard during storms. The belief in these creatures is universal among Tibetans. None, however, of the many Tibetans I have interrogated on this subject could ever give me an authentic case. On the most superficial investigation it always resolved itself into something that somebody heard tell of.”

Waddell goes on to declare that the wild man was nothing more than a bear, then says that the people of the area are just superstitious ignoramuses.

I dislike that most descriptions and discussions about Yetis are filtered through European experiences, and that the older reports especially have a high-handed tone that ruffles my feathers—not just racist, but classist as well. Brown people and poor people are not stupid, and what someone from one culture dismisses as a superstition may be a deeply held religious belief in another culture. Moreover, as anthropologist John Napier wrote in 1973, the superstitious sherpas that white explorers sneer at may actually have been having a sly joke at their employers’ expense—that or they’re just being polite and telling their employers what they think they want to hear. Or both, heck. People are complicated.

But consider what has happened when Europeans eager to discover the “truth” of the Yeti encounter Buddhist monks with Yeti relics. In 1959 Tom Slick, a rich Texas oilman who liked to indulge his hobby of bigfoot hunting—we met him in the giant salamander episode, you may remember—funded an expedition to Nepal to hunt for the Yeti. This was his fourth Yeti hunt, and some historians suspect he and many other explorers in the area had CIA connections. This was during the cold war, remember. But Slick’s interest in the Yeti was genuine, and during his 1958 expedition he had tried to buy a mummified Yeti hand from a Buddhist monastery in Pangboche, Nepal. The hand, along with a Yeti scalp, was a sacred relic and definitely not for sale. So in 1959 Slick arranged for explorer Peter Byrne to go back to the monastery and steal a finger from the hand. Supposedly Byrne replaced the missing finger with a human finger he had brought with him. Where on earth do you even get a human finger? Anyway, as Byrne reports, to get the finger out of Nepal he gave it to the actor Jimmy Stewart, who was one of the expedition’s backers. Stewart’s wife Gloria smuggled the Yeti finger out of the country in her lingerie case. It was later analyzed and found to be a human finger.

Everything about this story is horrible. First of all, it is not cool to steal sacred relics. Second, it’s not cool to swap out human body parts to cover your theft. And third, you know what they did with the stolen Yeti finger that turned out to be human? They lost it, that’s what they did. For decades no one knew where it had gone. Fortunately, it was rediscovered in a London museum in 2008, and DNA analysis confirmed it was human. The BBC interviewed Byrne in 2011 and his story had changed somewhat about his acquisition of the finger. He now says he paid the monastery for it. Mmhm. Sure. Someone stole the rest of the hand from the monastery in the 1990s, along with a yeti skull-cap.

Other Yeti remains have been analyzed more ethically. Sir Edmund Hillary, the guy who first summited Everest, and zoologist Marlon Perkins mounted an expedition in 1960 through ‘61, and went back to the Pangboche monastery to examine their relics. But this time, no one stole anything. In fact, the expedition paid for some repairs to the monastery, and paid for a village elder to accompany a Yeti scalp they were allowed to borrow, which they sent to be analyzed. They also raised money to construct schools and medical clinics in remote villages, among other good works.

The Yeti scalp, and others like it, turned out to be made from the shoulder skin of a goat-like wild animal called a serow. In fact, the Hillary-Perkins expedition was able to make its own Yeti scalps with serow skins dried over a conical wooden mold. It sent its homemade scalps with the borrowed scalp for analysis without telling the lab that some were not authentic. The results came back that all the scalps were made from the same type of animal skin.

In 1986 mountaineer Reinhold Messner had a terrifying encounter with an unknown animal. I’m going to quote it at length because it’s pretty awesome. It’s from his book My Quest for the Yeti, but I have taken the quote again from Abominable Science.

“Making my way through some ash-colored juniper bushes, I suddenly heard an eerie sound—a whistling noise, similar to the warning call mountain goats make. Out of the corner of my eye I saw the outline of an upright figure dart between the trees to the edge of the clearing, where low-growing thickets covered the steep slope. The figure hurried on, silent and hunched forward, disappearing behind a tree only to reappear again against the moonlight. It stopped for a moment and turned to look at me. Again I heard the whistle, more of an angry hiss, and for a heartbeat I saw eyes and teeth. The creature towered menacingly, its face a gray shadow, its body a black outline. Covered with hair, it stood upright on two short legs and had powerful arms that hung down almost to its knees. I guessed it to be over seven feet tall. Its body looked much heavier than that of a man of that size, but it moved with such agility and power toward the edge of the escarpment that I was both startled and relieved. Most I was stunned. No human would have been able to run like that in the middle of the night. It stopped again beyond the trees by the low-growing thickets, as if to catch its breath, and stood motionless in the moonlit night without looking back.”

Messner finishes the sighting by saying it rushed up the slope out of sight on all fours. Messner fled to the nearest village.

After that he spent the next ten years searching for more information on the Yeti. He examined Yeti remains in various monasteries and in all cases found they were either taxidermied creations made from various known animals, or the pelts of bears. In 1997 in the peaks of the Nanga Partains, he and his guide Rozi Ali saw what the locals called a dremo. That’s a Tibetan word commonly used for both the yeti and the Himalayan brown bear. Here’s his description:

“One afternoon, after a long trek, we encountered another dremo. He fled when he saw us, but then seemed to stop and rest in a hollow. I approached the spot from behind some ridges so that he wouldn’t pick up my scent. Rozi Ali followed me. When I began to climb down to where the animal was sleeping in the grass, Rozi Ali tried to stop me. I broke free from his grasp and came within twenty yards of the animal, where I took some good pictures. Rozi Ali, crouching some way back, begged me to make a run for it. He was sweating with fear.

“The animal woke up and looked at me in the way a startled child would a stranger. It was a young brown bear.”

He also says they saw another dremo later, while in Kashmir, and it was “running away on two legs. From a distance it looked uncannily like a wild man”. But it too was a brown bear.

Messner concluded, not unreasonably, that the Yeti was a bear. Many others agree. As it happens, I agree too, and I wonder if a bear that walks upright like a person is perhaps considered to have supernatural traits. After all, Messner found it eerie even when he knew what he was seeing. That might explain the overlap between terms for yeti and terms for bears, and would also explain why so many words translated as yeti actually mean man-bear. But I’d be delighted if a strange upright animal lives in the remote parts of the world, even if that strange animal just turns out to be a new species of bear.

In 2014, geneticists from Oxford University analyzed hair samples from a Himalayan bear and determined that the DNA was similar to that of a 40,000 year old polar bear. But a new analysis in 2015 by geneticists from the Smithsonian and the University of Kansas was a lot less exciting, determining that the hair belonged to a native brown bear after all—but probably to a rare, endangered subspecies of brown bear that lives in parts of the Himalayas, sometimes called the Tibetan blue bear. It’s not blue, by the way. It’s brown. I don’t know why it’s called a blue bear.

The Himalayan brown bear usually lives above the timber line in the mountains and like other bears is omnivorous. That means it eats both plants and meat. It especially likes to eat marmots, a chubby rodent related to squirrels that looks a lot like a prairie dog.

Many cryptozoologists think the Yeti and other bigfoot-type creatures must be either an unknown offshoot of the human family, like a Neandertal, or another unknown great ape that has developed an upright stance, such as a descendant of Gigantopithecus. They even propose that different types of bigfoots are different species of upright ape, all unknown to science.

I do think there are a lot of unknown animals out there, but I’m definitely skeptical that somehow we’ve overlooked multiple living species of giant apes, and not only that, that we haven’t even found fossil or subfossil remains of any of them. Gigantopithecus, by the way, is RIGHT out as a possibility. It was huge, sure, and an ape, sure, but it disappeared from the fossil record 300,000 years ago and ate mostly bamboo. Some researchers think it died out due to competition with pandas, in fact. It was related to orangutans and probably looked more like a big gorilla than a human, and would not stand upright. Remember that among all mammals, humans are the only ones who have developed true bipedalism, and we’ve sacrificed a lot in exchange. For instance, we have weak backs, childbirth is much more difficult, and we frequently die from falling off our own feet and cracking our heads, despite our massively thickened skulls. Other apes would not have developed bipedalism unless they faced the same intense evolutionary pressures that our ancestors did millions of years ago. But we have found no evidence whatsoever that other apes developed bipedalism.

So what about the Yeti being the descendants of Neandertals or other close human relatives? That’s a stronger argument, but if you’ve listened to episode 25 about our close cousins, you’ll remember that they were wearing jewelry and making tools before disappearing from the fossil record only around 30,000 years ago. They didn’t have fur and wouldn’t have been walking around in the snow with bare feet. Our cousins basically looked and acted a whole lot like we do. Remember also that the ancestors of humans and our close relations have been painting our bare skins with ochre and other minerals for 300,000 years for social reasons. We’re not going to go back to sprouting thick fur coats and wandering the mountains in solitude, not without many millions of years of selective evolutionary pressures. But bears are already big hairy solitary animals, and bears can and do walk upright for stretches, especially younger animals.

I could talk about the Yeti for the next hour and still not cover all the material available, so if you’re a Yeti enthusiast who’s sputtering about me skipping all the best evidence, there are a ton of excellent podcasts who’ve covered the topic in much more detail and come up with much different conclusions than I have. I’ve included links to a bunch of them in the show notes for anyone who’s interested in digging a lot deeper into the Yeti’s history.

Next week we’ll be visiting other remote areas of the world to look at more obscure bigfoot-type legends, from Australia’s bunyip and yowie to the giants of Patagonia. Until then, remember to sample the candy you bought to give out on Halloween, to make sure you made good choices. It’s okay if you have to get more later.

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Thanks for listening!