Plus.Maths.org
Maths in a minute
Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words. From symmetry to Euclid's axioms, and from binary numbers to the prosecutor's fallacy, learn some maths without too much effort.
Maths in a minute: Maths and communication 
A quick look at the role of mathematics in communication — from making and breaking codes to making sure messages arrive intact.
Maths in a minute: False positives 
Why a positive test result doesn't necessarily mean you have the disease.
Maths in a minute: How many primes? 
Here's the ancient proof that there are infinitely many prime numbers.
Maths in a minute: Einstein's general theory of relativity 
What would happen if the Sun suddenly exploded? Einstein wondered the same thing, and completely changed our understanding of the Universe.
Maths in a minute: Symmetry 
We all instinctively recognise symmetry when we see it, but describing it in words is harder than you might think.
Maths in a minute: The second law of thermodynamics 
Our messy desk is proof of the second law of thermodynamics...
Maths in a minute: Simplifying circuits 
Claude Shannon's ingenious insight linking physical circuits with Boolean algebra paved the way for modern computing.
Maths in a minute: The central limit theorem 
Opinion polls, election forecasts, testing new medical drugs — none of these would be possible without the central limit theorem.