Atomic clocks are the best time keepers, but need to be kept incredibly cold. Paradoxically, the cooling is achieved by shining light on them.
Bitcoin is a digital currency that isn't regulated by any kind of central authority. The structure which allows this decentralisation is called blockchain. But how, and how well, does it work?
Caucher Birkar has been awarded the Fields medal for his contribution to algebraic geometry.
If you can prove that a statement can't possibly be false, does this mean it's true?
We take the real numbers for granted, but what are they really?