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, ...

The story of the peppered moths is a textbook evolutionary tale. As coal smoke darkened tree bark near England's cities during the Industrial Revolution, white-bodied peppered moths became conspicuous ...

For decades, Britain’s peppered moth has been the textbook example of how humans can rapidly drive evolution in another species. New textbooks might want to use a New Zealand stonefly instead. The ...