A new study analyzes findings from more than 170 papers to clarify what we know so far about the ecological impacts of large carnivore recovery in North America and what mysteries still remain.

The strength and smarts it takes to be successful when food is hard to come by can become a little problematic when humans ...

Leedsichthys also sported 40,000 needle-like teeth. Yet for its prodigious size and toothiness, it was a gentle giant, like ...

While the polar bear is huge, it is not the biggest bear ever to walk around in North America. That honor would go to the ...