By expelling air from their blowholes while underwater, dolphins can produce a doughnut-shaped vortex that rises to the ...

Dolphins and whales have blowholes because they are air-breathing mammals with lungs, not gills.

A chittering dolphin can sound like a bunch of monkeys jumping on a deflating rubber raft—trills, squeaks, whistles and clicks. These creatures have honed this cacophony over millions of years to ...