Why is the expansion of our Universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

Albert Einstein, in 1905, presented the revolutionary idea of light quanta of energy which equals ħw, where ħ is reduced Planck's constant. There is plenty of experimental evidence on magnetic flux ...

Mihalis Dafermos holds the Lowndean Chair of Astronomy and Geometry at the University of Cambridge, UK. Yvonne Choquet-Bruhat was a giant of the mathematical study of Albert Einstein’s general theory ...

Gödel found a time-travel solution in General Relativity, revealing spacetime can loop on itself. Gödel discovered a solution to General Relativity that actually permits time travel — no exotic ...