Do gravity-carrying particles need to exist in order to explain how gravity arises?
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All the fundamental forces are thought to be carried by a particle, but a new mathematical model suggests gravity may be a striking exception. Building on a decades-old idea, researchers have revealed a path towards understanding this possibility in detail and testing it experimentally.
Manthos Karydas at the Lawrence Berkeley National Laboratory (LBNL) in California says that gravity stands out from the other fundamental forces. One reason for this…
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