Laser beams have gravity and can warp the fabric of the universe

Even though laser beams have no mass, they do have a tiny amount of gravity, which allows them to drag and warp space and slow down time as they propagate

PBS Space Time, How Does Gravity Warp the Flow of Time?, Season 7, Episode 7

The Warping of Space Time – Moondawg's Space News

Is space-time smooth or chunky?

The General Relativity Rabbit Hole: Unraveling Space, Time and the Fourth Dimension - CNET

Could ripples in spacetime point to wormholes?

Einstein's gravitational waves 'seen' from black holes - BBC News

Nobel 2017 Physics - Gravitational Waves

Spacetime - Wikipedia

Astronomers edge closer to detecting background “sea” of gravitational waves