Why Wasn't There A Second Age of Reptiles?
An asteroid impact triggered the K-Pg mass extinction, wiping out the non-avian dinosaurs, ending the Age of Reptiles, and ushering in the Age of Mammals. But why was it the mammals who triumphed?
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When Red Pandas Roamed North America
How did a relative of the red panda end up in North America?
Webs vs wings: The arms race of the air
How did the competition of spiders vs insects drive them both into the air?
The Graveyard at the Center of the Earth
Why plate tectonics don't make sense.
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