When a German physicist returned from a health retreat 100 years ago, his ideas sparked a debate about reality, and gave rise to quantum mechanics — the "spooky" science of the very small.

Physicists are rethinking time itself. Long treated as a basic part of the universe, time may instead be an illusion—a side ...

"This work is a step toward understanding how quantum mechanics and gravity work together, a major unsolved problem in ...

Usually, light waves can pass through each other without any resistance. According to the laws of electrodynamics, two light ...

"God does not play dice." This famous remark by Albert Einstein critiqued the probabilistic nature of quantum mechanics.

Speculative elements may not be necessary to explain the cosmos. A team of researchers, led by Raúl Jiménez, an ICREA ...

Scientists propose using quantum-entangled clocks to test how gravity affects quantum mechanics in curved spacetime.

Black hole and Big Bang singularities break our best theory of gravity. A trilogy of theorems hints that physicists must go ...

At cosmological scales, Albert Einstein’s theory of general relativity has given scientists an immensely accurate blueprint ...

Instead of the big bang, some physicists have suggested that our universe may have come from a big bounce following another ...

One of the biggest challenges in modern physics is uniting quantum mechanics and general relativity. A new experiment may ...

Instead of the big bang, some physicists have suggested that our universe may have come from a big bounce following another ...