10:18
Eons
The Hazy Evolution of Cannabis
How did such a strange plant like cannabis come to be in the first place?
- TV-Y7
The Huge Extinctions We Are Just Now Discovering
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.
The Huge Extinctions We Are Just Now Discovering
Season 6 Episode 8 | 8m 58s | CC
What graptolites tell us is a story of incredible changes in the ocean, of periods where the oceans became poisonous and suffocating before eventually clearing up again. They unlock extinctions and recoveries that scientists didn't see. And, most of all, they show us how unpredictable the Silurian period really could be.
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