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‘Bumblebee gravity’ could explain why the universe is expanding so fast



Physicists have long assumed that the universe is pretty much the same in every direction, and now they have found a new way to test this hypothesis: by examining the shadow of a black hole.

If this shadow is a bit smaller than existing physics theories predict, it may help to prove a far-fetched notion called bumble bee gravity, which describes what would happen if the seemingly perfect symmetry of the universe is not so perfect.


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