Check out the Twister Handbook, and tour the high-tech vehicles that the Storm Chasers drive into tornadoes.

  Everyone talks about the weather, but see how much you really know. Take the Weather Myth quiz. And watch behind-the-scenes video.

  There's more evidence that dinos and birds are closely related. Now scientists say they probably breathed the same way. Find out more.

  Get the inside story on the Last One Standing athletes. Read their blogs. And you can even leave them voice mails.

  Check out new video on how the Man Vs. Wild crew prepares Bear to take on nature. And see how you'd do in the desert.