Dead Whales Land in Canary Islands After Naval Exercises

Fourteen whales beached in the Canaries in 2002 during multinational military exercises there. It was one of several mass strandings of whales that scientists have linked to the use of naval sonar systems.

A year later, researchers published a study in the science journal Nature that found sonar may cause a type of decompression sickness in whales and dolphins. (Reuters)