More than 150 years ago, the economist and philosopher William Stanley Jevons discovered something curious about the number 4. While musing about how the mind conceives of numbers, he tossed a handful ...

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, ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? In data science, informal prefixes were already starting to become common, leading to ...