# history of mathematics

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? |

Does light have weight? Newton thought so. His laws predicted that gravity would bend light, two centuries before Einstein's revolution. |