You're probably most familiar with the phenomenon when it appears like this (well until that wizard starts showing off) but did you know that vortex rings can also be created by dolphins? [more inside]
posted by PapaLobo on Sep 25, 2011 - 21 comments

Dolphin rescues beached whales [more inside]
posted by kliuless on Mar 16, 2008 - 32 comments

Echolocation : bats use it. So do whales and dolphins. And humans? The 14-year-old profiled here and here is using it. Learn more about how blind people are employing perception and processing of the auditory environment: where words like flash and tags have an altogether different meaning.
posted by flapjax at midnite on Aug 21, 2006 - 28 comments

Doplhins and whales have no standing to sue. This is a sad day for the cetacean community. The time for revolution is now.
posted by homunculus on Oct 21, 2004 - 12 comments