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Photo: Angry Bird

They peck. They kick. They hiss and spit. Some even steal. Play this photo matching game to find out why some birds act so foul.

Photo: Moon

Are We Alone?

Blast off into space to search for places where it may be possible for life to exist.

Photo: Rock

Death Valley's Moving Rocks

Take a trip to a desert where rocks mysteriously move on their own. Join a scientist who is trying to solve this mystery.

Coming UpPhoto: Bird

Photographs by: © Winfried Wisniewski/Minden Pictures (bird); © Neale Clarke/Robert Harding World Imagery/Corbis (rock); Science Source (moon); MindStorm/Shutterstock (crab).