Nothing, not even light, can escape from a black hole. Or can it? Find out about one of Stephen Hawking's most radical results.
Explore a mystery that intrigued Stephen Hawking until the end of his life.
The answer comes from the physics of waves.
Perfect numbers have foxed mathematicians for over 2000 years. Here's a quick look at the long struggle to find them.
After 2000 years of searching we only know of 51 perfect numbers and they're all even. What else do and don't we know about these rare and precious jewels of maths?
Nobody has ever found an odd perfect number. So do they exist at all and, if yes, what do they look like?
You've heard of the golden ratio but have you heard of the silver ratio? And all its other cousins called the metallic numbers? Read this article to meet the family!
From Fibonacci to spirals: explore the mathematical wonders of metallic numbers.