@sciencex.bsky.social phys.org/news/2025-04...
So the undetectable stuff that makes up most of the universe and has a definite gravitational effect is also, 'almost massless'?
Gimme a break. Time for a new theory

Astrophysicists propose new method to directly detect ultralight dark matter
The detection of dark matter, the elusive type of matter predicted to make up most of the universe's mass, is a long-standing goal in the field of astrophysics. As dark matter does not emit, reflect o...