Quantum physics began in 1900 when the German physicist Max Planck determined the scale of quantum phenomena. In 1905, Albert ...

This idea puts a morbid twist on quantum theory, suggesting that a copy of you may remain alive, no matter what.

Bohr turned to Planck's quantum theory to explain the stability of most atoms. He found that the ratio of energy in electrons and the frequency of their orbits around the nucleus was equal to ...

Explore the key moments in the history of quantum theory, from the early ideas of Albert Einstein and Werner Heisenberg to ...

The classical scientific theories by which we understand the world around us do not hold good at the subatomic level. There, ...

At long last, a unified theory combining gravity with the other fundamental forces—electromagnetism and the strong and weak ...

Known as pilot-wave theory, it was firmly rejected by mainstream quantum physicists such as Niels Bohr and Werner Heisenberg, and by the time Bohm died in 1992 the idea had few followers left.