Physics
Ground State Fluctuations
Quick fact
The energy of ground state fluctuations in empty space is so immense that, in theory, a cubic centimeter contains more energy than all the matter in the observable universe, yet it is largely undetectable except through subtle quantum effects.
Why this is interesting
Imagine the emptiest, coldest region of space—void of matter and at absolute zero temperature. Even there, a ceaseless, invisible dance of energy is taking place. What is causing this perpetual motion?