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Einstein Might Have Been Wrong About Gravity... Here’s Why

The universe is expanding, and that expansion is speeding up... which is the opposite of what we expected.

There are lots of different ideas about what could be causing the inexplicable acceleration of this expansion, and one commonly suspected culprit is something called dark energy. Though historically, we aren’t entirely sure what dark energy is either. But now, we might finally have an explanation.

Professor Claudia de Rham at Imperial College London suggests something pretty radical: that gravity has mass.

In Albert Einstein's theory of general relativity, gravitons should be massless, but in de Rham’s proposal, the graviton has mass. And if gravitons have mass, then gravity is expected to have a weaker influence on very large distance scales, explaining why the expansion of the universe hasn’t been reined in.


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EverythingScience pinned Β«Small Channel Update All posts about, or related to, the Covid-19 pandemic will be marked with the hashtag #Covid19. This includes all past posts too. By tapping or clicking #Covid19, or by typing it into search you'll be able to quickly access all of the…»