People have known that whales make sounds since the seventies, roughly. And since then people have been wondering, how do they do this? Actually, how do they make sounds?" The Professor is part of ...

Elemans said the animals adapted their voice boxes over tens of millions of years to make sounds ... The whale voice boxes tested were from juveniles, not adult males, who do the singing.

Deep in the Pacific, humans have tracked a mysterious whale’s call for decades—but no other whale seems to respond. And now, we might be running out of time to find the source.