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Eons
The Huge Extinctions We Are Just Now Discovering
Season 6
Episode 8
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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8:06
Around 10,000 years ago, a parasite made a huge leap and found its way to a new host: Us.

9:38
Here's how pterosaurs went from being airborne to pedestrian.

8:14
Dental calculus is the only part of your body that actually fossilizes while you're alive!

9:17
Here's why these skilled toolmakers, hunters, and foragers' population disappeared.

10:11
For the first 80 million years of plants' existence, leaves didn't exist. Here's why.

7:49
We learn about Dinosaur mating behavior from fossil records.

10:05
Here's how the evolution of ocean-going whales affected deep-ocean communities.

11:09
Scientists discover dinosaurs and tiny mammals' sleep habits are different than thought.

7:55
The history of how the Amazon's revolution began in just one day.

9:59
Discover the effects of the Toba supervolcano.

9:32
Pollination by insects actually got going twice.

6:46
The Toxodon fossils help reveal the mystery surrounding evolution.