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 Markov numbers reveal the secrets of irrational numbers and the patterns of the Fibonacci sequence. But there’s one question about them that has resisted proof for over a century. Most people are ...

Isaac Asimov’s iconic science fiction collection “I, Robot” tells the story of androids created at U.S. Robots and Mechanical Men, Inc. The androids range from “Robbie,” who is nonvocal, to “Stephen ...