Check out one of nature's engineering marvels, the eggshell. See a dog kennel-shaped satellite. Find out how fast escape velocity is, how to dye your clothes and how hibernating bears maintain muscle tone.

Bizarre but true - Kari creates a cloud in a bottle, checks out a snake that bites when it's dead and discovers what causes phantom traffic jams. Plus, check out surviving in space and a robot fish with a working bladder.