Grooming plays an important part of social relationships among Japanese macaque monkeys. Photo: Kazuhiro Nogi / AFP The phrase 'you scratch my back and I'll scratch yours' means 'if you do something ...

Pashun George and her sister grew up scratching their mother’s back before bed. Now, they charge $130 an hour for it. In 2010, they turned the tradition into a family business, Scratcher Girls, the ...

It was once thought that only humans gestured to direct another person's attention, but such "referential" gesturing was recently observed in wild chimpanzees. It was once thought that only humans ...

Karina Sandberg suffers from such unbearable itching due to a severe case of eczema that the 29-year-old mother has resorted to using a pair of scissors to deal with the irritation. “One night my skin ...