Episode 1
Aired Jul 13, 2021
Did These Giant Sloths Poop Themselves to Death?
At Tanque Loma, at least 22 giant ground sloths in the genus Eremotherium met their end; of the five hypotheses that researchers proposed for what killed the sloths, the best-supported one is that they died surrounded by their poop.
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Episode 4
Aired Aug 12, 2021
Where Are All the Medium-Sized Dinosaurs?
The remains of medium-sized predatory dinosaurs are pretty rare in places where giant predators like T. rex existed.
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Episode 5
Aired Aug 23, 2021
How the Starfish Got Its Arms
The story of how the starfish got its arms reminds people that even animals that might be familiar today can have deep histories that stretch back almost half a billion years.
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Episode 7
Aired Sep 15, 2021
How Pollination Got Going Twice
The world of the Jurassic was a lot like the world now, similar interactions between plants and insects were happening, but the players have changed over time; pollination by insects got going twice.
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Episode 8
Aired Sep 22, 2021
How a Supervolcano Ignited an Evolutionary Debate
The effects of the Toba supervolcano, the biggest explosive eruption of the last 2.5 million years.
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Episode 10
Aired Oct 6, 2021
When Mammals Only Went Out at Night
For decades, scientists believe dinosaurs were diurnal and tiny mammals were nocturnal; however, as researchers uncover more mammalian fossils and study the biology of different dinosaur species, they find some surprising results.
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Episode 11
Aired Oct 21, 2021
How Ancient Whales May Have Changed the Deep Ocean
The evolution of ocean-going whales may have affected communities found in the deep ocean, like the ones found around geothermal vents.
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Episode 13
Aired Nov 16, 2021
When It Was Too Hot for Leaves
Plants first made their way onto land at least 470 million years ago but for their first 80 million years, leaves as everyone knows them today didn't exist.
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Episode 14
Aired Dec 2, 2021
Why the Paleo Diet Couldn't Save the Neanderthals
Neanderthals lived in Eurasia for more than 300,000 years; they were expert toolmakers, skilled hunters and foragers, and may even have created cave art; exploring what caused their decline.
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Episode 16
Aired Dec 15, 2021
When Pterosaurs Walked
While pterosaurs may be well-known for their domination of the skies in the Mesozoic Era, they didn't live their entire lives in the air.
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Episode 17
Aired Jan 21, 2022
How Our Deadliest Parasite Turned to the Dark Side
Somewhere in Africa, a microscopic parasite made a huge leap with a little help from a mosquito; it left its animal host and found its way to a new host, people.
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Episode 18
Aired Jan 18, 2022
Primates vs Snakes (An Evolutionary Arms Race)
The snake detection hypothesis proposes that the ability to quickly spot and avoid snakes is deeply embedded in primates; an evolutionary consequence of the danger snakes have posed to us over millions of years.
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Episode 19
Aired Jan 27, 2022
Did Eating Insects Shrink These Dinos?
Dinosaurs are considered as either preying on other dinos or mammals, or as plant-eaters -- but in ecosystems today, those aren't the only two options.
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Episode 20
Aired Feb 8, 2022
How Vertebrates Got Teeth... and Lost Them Again
As revolutionary as teeth were, they would go on to disappear in some groups of vertebrates.
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Episode 21
Aired Feb 16, 2022
How Horses Went From Food to Friends
Answering questions about the history of humans and horses.
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Episode 22
Aired Feb 23, 2022
Why We Only Have Ten Toes (It's a Long Story)
Today, all mammals, from humans to bats, have five fingers or fewer; birds have four or fewer, and amphibians get the best of both worlds, with four on their "hands" and five on their "feet," but no species of vertebrates has more than five digits.
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Episode 23
Aired Mar 23, 2022
When a Giant Pterosaur Ruled the European Islands
The ecological niche of apex predators was empty on Hateg Island, waiting to be occupied by something large, mobile, and powerful enough to fill it.
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Episode 24
Aired Feb 22, 2022
The Sudden Rise of the First Colossal Animal
An enormous ichthyosaur, around the size of a modern sperm whale, reached its size within just a few million years of taking to the water -- a blink of an eye in evolutionary time.
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Episode 25
Aired Mar 29, 2022
The Extreme Hyenas That Didn't Last
Hyenas weren't always able to eat bones; a few million years ago, they lived very different lives.
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Episode 26
Aired Apr 13, 2022
How the Smallest Animal Got So Simple
Evolution doesn't always make animals bigger or more advanced; Myxozoans evolved from something more complex.
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Episode 27
Aired Apr 20, 2022
Why Sour May Be the Oldest Taste
While sour taste's original purpose was to warn vertebrates of danger, in a few animal groups, its role has reversed; the taste of danger became something it was dangerous to avoid.
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Episode 28
Aired Apr 27, 2022
The Ancient Human Species With a Missing Body
Only a handful of Denisovan fossils have been identified; in the absence of actual body fossils, it may be hard to reconstruct their morphology.
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Episode 29
Airs undefined
When Ants Domesticated Fungi
A look at when, how and why ants started farming.
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Episode 33
Aired Jan 25, 2023
Something Has Been Making This Mark for 500 Million Years
Paleodictyon, a hexagonal-patterned fossil, is a mystery.
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Episode 34
Aired Jan 25, 2023
Giant Viruses Blur the Line Between Alive and Not
In 2003, microbiologists made a discovery that changed what is known about the evolution of microbial life: giant viruses.
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Episode 36
Airs undefined
How Plate Tectonics Transformed Los Angeles
Exploring the natural history of Los Angeles.
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Episode 39
Airs undefined
How Whale Evolution Kind Of Sucked
Exploring the evolutionary path of baleen whales.
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