Michael Faraday Discovers Electromagnetic Induction
Faraday discovered electromagnetic induction on October 17, 1831, the principle behind the electric generator and the transformer.
Neptune Is Found Where the Mathematics Said It Would Be
On September 23, 1846, Neptune was observed at Berlin within a degree of the position predicted by Le Verrier's mathematics.
Einstein Publishes the Paper That Introduces E=mc2
On September 27, 1905, Einstein's paper on mass and energy was published, introducing the relation E=mc squared.
Leo Szilard Conceives the Nuclear Chain Reaction
On September 12, 1933, Leo Szilard conceived the nuclear chain reaction while crossing a street in Bloomsbury, London.
The Convention Establishing CERN Is Signed
On September 29, 1954, twelve countries signed the convention establishing CERN, the European particle physics laboratory near Geneva.
The United States Conducts Its First Underground Nuclear Test
On September 19, 1957, the US fired Rainier, its first fully contained underground nuclear test, in a tunnel in Nevada.
The Large Hadron Collider Is Powered Up
On September 10, 2008, the Large Hadron Collider at CERN ran its first beam around its 27 km ring, starting the biggest physics experiment.
LIGO Detects Gravitational Waves for the First Time
On September 14, 2015, LIGO detected gravitational waves from merging black holes, confirming a prediction Einstein made in 1916.