Join hosts Kallie Moore, Michelle Barboza-Ramirez, Gabriel Santos, 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.

We Can't Remember What Giant Sloths Were Like

Premiered June 09, 2026
We Can't Remember What Giant Sloths Were Like

Even though we once knew them pretty well, firsthand knowledge of giant sloths is now lost to time – including some of the most basic aspects of their biology and behavior.

So, what did ancient people once know about these bizarre megafauna that we’ve since forgotten?

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