# Einstein

To celebrate the centenary of the general theory of relativity we asked physicist David Tong to explain the theory and the equation that expresses it. Watch the video or read the article! |
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. |
To celebrate the release of more English translations of Einstein's papers, we revisit one of his previously unknown models of the Universe. |

Does light have weight? Newton thought so. His laws predicted that gravity would bend light, two centuries before Einstein's revolution. |
A talk by one of our favourite physicists about Einstein, relativity and gravitational waves. |

Why (some) physicists want to modify Einstein's general theory of relativity. |
Cormac O' Raifeartaigh recently made a surprising discovery – an unpublished paper by Albert Einstein that sheds light on how Einstein's thinking about the Universe changed as he tackled some of the big questions in cosmology at the time. |

This is the second article in our four-part series exploring quantum electrodynamics. After successfully applying quantum mechanics to the electromagnetic field, physicists faced a problem of boundless proportions: every calculation they made returned infinity as the answer. |
You may have heard of quantum theory and you probably know what a field is. But what is quantum field theory? This article traces the development of quantum electrodynamics in the first half of the 20th century. Hair raising difficulties, heroic struggle and illustrious characters — this story has it all! |