Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Open almost any textbook dealing with biological evolution and you’ll probably find photographs of peppered moths resting on tree trunks—illustrating the classic story of natural selection in action.

Journalist Hooper offers an engaging account of H.B.D. Kettlewell's famous field experiments on the peppered moth, which were widely known as "Darwin's missing evidence," proof of natural selection in ...