Males show fewer tooth-rake marks when mothers are present and have stopped breeding, research shows
Post-menopausal killer whales protect their sons from getting injured in fights with other whales, scientists have found.
The study showed that males showed fewer tooth-rake marks – scars left when whales scrape their teeth across another’s skin – when their mother was still present and had stopped breeding. But the protective effect did not extend to daughters.
More Stories
Microsoft unveils chip it says could bring quantum computing within years
I became absorbed in strangers’ fertility journeys online
Virologist Wendy Barclay: ‘Wild avian viruses are mixing up their genetics all the time. It’s like viral sex on steroids’