Interesting fact:

There are three main types of sounds made by whales: clicks, whistles and pulsed calls. The clicks they make are probably the most fascinating, though. As the sound waves bounce off of an object, they create a kind of audible image once they return to the whale, allowing it to identify the shape of predators, food sources and just about everything under the ocean. This is particularly impressive when you consider that a whale’s voice is capable of traveling about 479 miles through the ocean waves...