Via MSNBC, but widely linked:

BOSTON — A 50-ton bowhead whale caught off the Alaskan coast last month had a weapon fragment embedded in its neck that showed it survived a similar hunt — more than a century ago.

Embedded deep under its blubber was a 3-1/2 inch arrow-shaped projectile that has given researchers insight into the whale’s age, estimated between 115 and 130 years old.