WHY WE NEED TO USE SOAP & HIPPO RACES - Spanish Captions
Clip: Special | 10m 19s | Video has closed captioning.
Cassondra Easterling and two young helpers explore how a soapy finger causes pepper -- representing germs -- to disperse in water. At the Memphis Zoo, hippos compete in Zoolympics.
Problems Playing Video? | Closed Captioning