Content about “

Einstein

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To celebrate the recent centenary of the first major test of Einstein's general theory of relativity, we look back over how our picture of gravity has changed.

A hundred years ago, on 25 November 1915, Einstein first presented his general theory of relativity. We explore this famous theory and what it says about the world we live in.

Pau Figueras explains how Einstein's theories predicted the existence of black holes, and how to describe them mathematically.

Small, dark, and very hard to see. This and far more indepth answers to every question you ever wanted to ask about black holes.

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.

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Cormac O' Raifeartaigh recently made a surprising discovery – an unpublished paper by Albert Einstein that sheds light on how Einstein's thinking about the Universe changed as he tackled some of the big questions in cosmology at the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.