Oh, America. You do so confuse the rest of the world, with your “pounds per square inch” and “cups”, instead of sensible measurements like Pascals and liters. And part and parcel of that is your ...

212°F is the boiling point of water at sea level. The scale is widely used in the United States, some Caribbean countries, and a few others. It remains common in weather reports, household ...

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, ...