The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...

Olaf Sleijpen, the Dutch central bank governor, is right to urge caution (“Top ECB official warns on stablecoin threat”, Report, November 19). The rapid growth of stablecoins is too often cast in ...

The Möbius strip is a classic example of a topological structure. It can be made by taking a strip of paper, giving it a half twist and then joining the ends together to form a loop with only one ...