Cats can purr for minutes on end, and quite loudly at that. It makes you wonder: Isn’t that exhausting? Yet the animals usually seem relaxed, which has puzzled researchers for a long time. For decades ...

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, ...

SciFri Community Manager Kyle Marian Viterbo coaxes her latest interview subject, a cat who resides at Meow Parlor in New York City, to purr. Science Friday recently received a voicemail from a ...