Killer whales may have menopause so grandma can look after the kids

Killer whales are just one of three species – we're one of the others - that continue to live long after they've stopped reproducing. But scientists still don't know why these three alone evolved this unusual menopausal trait.

In a bid to find out, NERC has agreed to fund a project worth nearly £500k to look at why killer whales stop reproducing a third of the way through their lives, dedicating the rest of their lives to protecting and caring for children and grandchildren

Source: Here