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

Previous research indicated that kangaroos weighing more than about 350 pounds would rupture their ankle tendons if they tried to hop. The largest of the Ice Age kangaroos, Procoptodon goliah, which ...

In the past couple of decades, several species have been driven to extinction thanks, in large part, to human interference. Sometimes that interference is direct, poaching for big game trophies or ...