The Texas Panhandle saw a dizzying spread of tornados and thunderstorms on Friday, with at least three different tornadoes on the ground at once and giant hail more than four inches wide. Storm ...

From swimming faster than Olympic athletes to proposing with pebbles, penguins are full of surprising and lovable traits.

Is mercury pollution a real threat to penguins? Here's what scientists have discovered and what mercury is doing to these ...