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In this theory, vibrating strings would create gravitons, tiny particles that act under quantum mechanical laws but carry gravitational force.

The emptiness of the vacuum in quantum theory belies a sea of particles—photons, electrons, gravitons, and more—that conspire to make empty space feel empty.

They are even responsible for gravity—a hypothetical particle that carries the gravitational force, a “graviton,” is an inevitable consequence of the theory.

The words “graviton” and “biotechnician,” for example, first appeared in science fiction sources before being adopted in the real world.

His simulation suggests they do: when gravitons gather densely enough, eventually some of them turn into a burst of light particles.