A study of prehistoric bone tools from the Bay of Biscay revealed that they were 20,000 years old, the oldest known example of whale bone tools.

In a groundbreaking study published in Nature Communications, a team of researchers has uncovered the earliest known evidence of humans working whale bones into tools. The bones — sourced from at least six different whale species — were fashioned into projectile points and other implements as far back as 20,000 years ago.