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Season 1 Episode 38 | 8m 5s Video has closed captioning.
The ancestors of modern, squishy cephalopods like the octopus and the squid all had shells. In ancient times, their shell was their greatest asset but it eventually proved to be their biggest weakness.
Aired: 05/07/18
Why Triassic Animals Were Just the Weirdest
Why the Triassic was full of creatures that look a lot like other, more modern species.
Before a group of fish could live on dry land, they acquired the ability to breathe air.
Insects were the first animals to fly. Scientists are still working on how it happened.
420 million years ago, some fish wore armor – and it may have served a surprising purpose.
How Horses Took Over North America (Twice)
Horses vanished from North America for 10,000 years until a mammal brought them back.
Life, Sex & Death Among the Dire Wolves
Dire wolves were real! Their remains taught us a lot about how they lived.
When Giant Scorpions Swarmed the Seas
Sea scorpions thrived for 200 million years, coming in a wide variety of shapes and sizes.
Preview: EONS
Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age.
Explore Eons Now!
