It may have been another major mass extinction in our planet’s history.
Island gigantism strikes again.
The now-extinct giant beaver once lived from Florida to Alaska.
Megapixels: The ancient rock offers a glimpse of how this freshwater species behaved in unison.
In a good way!
Like dozens of others, the Scioto madtom has probably been extinct for years even though it's still listed as "endangered."
This time, they GIFed it.
New species get identified and named every year, even though you've probably never heard of them.
Sightless, flightless, and 10 feet tall.
It's asteroid versus volcano.
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