# history of mathematics

Read about the rocky road to one of Einstein's greatest achievements: the general theory of relativity, which celebrates its centenary this year. |
General relativity, Einstein's rise to international stardom, and his legacy. |

Can you measure information? It's a tricky question — but people have tried and come up with very interesting ideas. |
To celebrate the release of more English translations of Einstein's papers, we revisit one of his previously unknown models of the Universe. |

The self-taught Indian genius would have turned 127 this month. |
A little trig helps to find the relative distance to the Sun and Moon. |

How to derive the famous quadratic formula from pictures, just like the Babylonians did. |
Euclid's fourth axiom says that all right angles are equal. But isn't that obvious? |