4 ms·
> unobservable to us except through gravitational effects That’s how we observe it. We just don’t know what it is built from. (On the other hand, does it real
by Koshkin 5y ago
> unobservable to us except through gravitational effects
That’s how we observe it. We just don’t know what it is built from.
(On the other hand, does it really have to be built from anything? Like, can’t it be some sort of an “intrinsic” distortion of spacetime that, naturally, has an effect on the “normal” matter in the only way it can do so?)