Blind people can echolocate using visual center of brain

Canadian researchers have discovered just how some blind people are able to navigate accurately using the same echolocation technique as bats and dolphins.

Even low levels of sonar can drive whales to their deaths

Naval sonar exercises are much more distressing to beaked whales than previously believed, and are driving them to beach themselves, a new study has found.

Invisibility cloak hides underwater objects from sonar

University of Illinois researchers have developed an acoustic cloak, making underwater objects invisible to sonar and other ultrasound waves.