Earth looked much different not just millions, but even decades and centuries ago. Many animal species that once existed are ...

Ever wonder how saber-toothed cats and other extinct creatures behaved? Well, a team of scientists unearthed ancient footprints that offer insight into how various prehistoric animals lived as far ...

Sloth in prison -- The Great Basin now and then -- A zoologically impoverished world -- Dating an ass -- A stable of ground sloths -- Extinct mammals, dangerous plants, and the early peoples of the ...