Killer whale grandmothers boost survival of calves

Source: Science Daily

New research finds that killer whale grandmothers who were no longer able to reproduce had the biggest beneficial impact on the survival chances of their grand-offspring. This may be because grandmothers without calves of their own are free to focus time and resources on the latest generation, the researchers suggest.

https://www.sciencedaily.com/releases/2019/12/191209161339.htm