Scientists made a breakthrough in the study of whale sounds. Here's a look at the numbers

Researchers on Cape Cod, Massachusetts, recently discovered the oldest known recordings of whale sounds and believe the discovery could help scientists understand how animals communicate. The recording is the song of a humpback whale, a species of large whale known for its complex songs. Researchers at the Woods Hole Oceanographic Institution in Falmouth, Massachusetts, say the sounds were recorded in March 1949 off the coast of Bermuda. Scientists say the recording is important because it documents whale song at a time when the ocean was calmer.