Wild New Study Suggests Gravity Can Exist Without Mass

[Warpy]

What is gravity without mass? Both Newton's revolutionary laws describing its universal effect and Einstein's proposal of a dimpled spacetime, we've thought of gravity as exclusively within the domain of matter.

Now a wild new study suggesting that gravity can exist without mass, conveniently eliminating the need for one of the most elusive substances in our Universe: dark matter.
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The latest offering in that vein comes from astrophysicist Richard Lieu at the University of Alabama in Huntsville, who has suggested that rather than dark matter binding galaxies and other bodies together, the Universe may contain thin, shell-like layers of 'topological defects' that give rise to gravity without any underlying mass.

Lieu started out trying to find another solution to the Einstein field equations, which relate the curvature of space-time to the presence of matter within it.

https://www.sciencealert.com/wild-new-study-suggests-gravity-can-exist-without-mass

[erronis]

1. Isn't that what's so wonderful about science versus religion?

We can continuously look at our theories and explanations and question them without being put to death.

Of course some may feel that questioning the current scientific consensus is almost as bad as Auto-da-fé.

[Warpy]

2. That sort of thing drives religious types crazy

They want answers, what good are questions? They want stuff that will be true for ETERNITY.

Sure thing, quoth she, as she reflects on the dust clumping in the baggie in micro gravity and thinks this new theory goes a long way toward explaining that, too

Well, until something better comes along, eh?