The Case of the Split Skateboard
Josh, Toby, and Donna are competing in a skateboard competition. After DonnaÕs wins first place, someone kicks her skateboardÑcausing it to split in two. Who is to blame? Perform an experiment on center of gravity to find out.

A Dwindling River
The Colorado River once raged through the United States. Now, the river is drying up. Find out how growing human populations are affecting the supply of fresh water all over the world. Discover simple ways in which everyone can conserve this precious liquid.

Attack of the Body Beasts
From spiderlike organisms that live in your hair to bacteria that cause stinky feet, billions of creatures call your body home. Get the scoop on some of the parasites that live on the human body. Plus, learn hygiene tips for keeping some of the beasts at bay.