Human echolocation lets blind man 'see'

http://www.cnn.com/video/?/video/tech/2011/11/08/natpkg-orig-blind-echolocation-poptech.cnn#/video/tech/2011/11/08/natpkg-orig-blind-echolocation-poptech.cnn

by rosariom • 15 years ago

3 0 15 years ago