Most of us have little trouble working out how many milliliters are in 2.4 liters of water (it's 2,400). But the same can't ...

Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Quantum mechanics has at last been formulated exclusively with real numbers, bringing a mathematical puzzle at the heart of ...

Artificial intelligence (AI) is increasingly prevalent, integrated into phone apps, search engines and social media platforms ...