A brief introduction to temperate rainforests.

Learn how sounds make their way from the source to your brain. 

Learn how sounds make their way from the source to your brain. 

An elephant uses three different parts of its body to hear sound. Do you know which parts? Filmed at the Smithsonian National Zoo in Washington, DC.

Through echolocation some animals emit sounds of different frequencies and loudness that bounce off the objects around them. The echoes are then captured by the ears and the brain figures out how to recognize food and navigate the surroundings from those signals.