In 1876, Peter Guthrie Tait set out to measure what he called the “beknottedness” of knots. The Scottish mathematician, whose research laid the foundation for modern knot theory, was trying to find a ...

The original version of this story appeared in Quanta Magazine. Imagine that someone gives you a list of five numbers: 1, 6, 21, 107, and—wait for it—47,176,870. Can you guess what comes next? If ...

Learn how to build a simple and efficient iron farm in Minecraft 1.20 and newer versions. This design works for both Java and Bedrock editions, and is suitable for survival worlds. The farm uses golem ...