Quantum foam

A graphic representation of Wheeler's calculations of what quantum reality may look like at the Planck length

Quantum foam (also known as spacetime foam, or spacetime bubble) is a theoretical quantum fluctuation of spacetime on very small scales due to quantum mechanics. The theory predicts that at this small of a scale, particles of matter and antimatter are constantly created and destroyed. These small subatomic objects are called virtual particles. The idea was devised by John Wheeler in 1955.

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