January 24, 2007—They may have big ears, but elephants also "hear" using other parts of their bodies, scientists have found.

In recent research, biologists have discovered that elephants' feet and trunks are remarkably sensitive, allowing the anim als to detect a wide range of vibrations. There's even evidence to suggest that elephants might understand the meaning of one shaky signal from another.

Join a researcher as she studies elephants in the wild, as well as a pachyderm test participant at California's Oakland Zoo, to discover how the giant animals communicate with one another without making a sound.