Wacky Physics: The Coolest Little Particles in Nature
The field of quantum mechanics all fundamental forces are carried by particles. For instance, light is made up of massless particles called photons that carry the electromagnetic force. Likewise, the graviton is the theoretical particle that would carry the force of gravity. Scientists have yet to detect gravitons, which are tricky to find because they interact so weakly with matter.
Quantum gravity evidence: Richard P. Feynman’s theory versus string theory
Einstein proved that gravity does not exist, i.e. that spacetime is warped by mass. String theory proposes a new particle called the "graviton" which transmits the force of gravity. The debate rages on.
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