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Not just a matter of time: Measuring complexity

Are there problems computers will never be able to solve, no matter how powerful they become? This series of articles explores the question and finds surprising answers.

There may be more than one of you

The possibility that there might be many parallel worlds has just become a little more likely.

Easy as ABC?

Mathematicians are working hard to understand an impenetrable proof of the famous ABC conjecture.

Maths in a minute: How many primes?

Here's the ancient proof that there are infinitely many prime numbers.

Have you heard? The maths of rumour spreading

Mathematical models predict how fast a rumour will spread and how many people it's likely to reach.

Stuff happens: What's happening?

We all know what we mean when we say that something has happened — well, all except for theoretical physicists, who have grave difficulty with the notion of "events". Find out more with these articles and videos.

Maths in a minute: The prosecutor's fallacy

Why a DNA match doesn't necessarily prove your guilt.

Weighing balls

This puzzle is apparently used in job interviews — would you pass?