And speaking of whales, here is a story of whales speaking - or more precisely, one whale, with its own, distinctive 52-hertz voice.
In 1989, a team of WHOI biologists first detected an unusual sound in the North Pacific Ocean. It had all the repetitive, low-frequency earmarks of a whale call, but at a unique frequency - 52 hertz - far higher than the normal 15-to-25-hertz range of blue or fin whales. They recorded it again in 1990 and 1991.