Things We Don't Know

Why is stainless steel stainless? Iron vs Steel Steel is made from iron, but it’s not the same thing: steel is an alloy - iron doped ...

A number of astute observers have already noticed (and clicked on) two mysterious links that have appeared on the Things We Don’t Know hom...

By now, you’ve probably heard the hubbub in the news about the hypothetical “Ninth Planet” in our Solar System, and, unfortunately for thos...

What holds the world together? It sounds like a simple question - but it isn’t.We know of four fundamental forces of nature that seem to ...

The formation of Deimos and Phobos, the moons of Mars, is still somewhat of a mystery. They were discovered by Asaph Hall in 1877, and obse...

Hello all, I’m Alice and I’m the new SEPnet intern at Things We Don’t Know. I’ve just finished my third year studying physics at Royal Hol...

Imagine you are inside a nuclear reactor, a UK design. Not only are you inside it, but you are part of it; a carbon atom inside the graphit...

How do we recognise faces? Most humans can recognise hundreds of faces, and tell the identity of each one, even in different lighting con...