A plastic disc labeled "fish noises" sat in a Woods Hole archive for 75 years, and turned out to be the oldest known recording of a humpback whale.

Recording of humpback whale from 1949 could also provide new understanding of how the huge animals communicate

Woods Hole researchers stumbled on a plastic disc labeled "fish noises" — and found the oldest known recording of a humpback whale, from a much quieter ocean.

A plastic disc labeled "fish noises" sat in a Woods Hole archive for 75 years, and turned out to be the oldest known recording of a humpback whale.