There are two species of lice that infest humans: pubic lice, Pthirus pubis, and human head and body lice, Pediculus humanus.

Weiss points out that our evolutionary ancestors were uniformly hairy so why did two types of lice emerge.

“I was having difficulty envisioning a clear separation of habitats between the groin and other parts of our [...]

“We now know so much about the process of evolution that we can make some predictions about what might happen in future,” says Professor Jones of the UCL Department of Genetics, Evolution and Environment. “To many people the future looks dystopian, doomed – an idea that goes back centuries. In modern terms, there is a [...]

It could be that it is our brain that makes us listen to these stories and react out loud, to calibrate our sensitivities with those of our group.

It isn’t the story that really matters, but the vocal reactions of approval and disapproval of the people around us. They tell us how we should think to [...]