We’re not even really sure about the nature and origin of all the inanimate stuff in the universe, not to mention any potential people. All of your favorite parts of the cosmos, from stars and planets to supernovae and black holes, is made of ordinary matter and accounts for only about 5 percent of what’s actually out there. All the rest is mysterious dark energy and dark matter. Even their names betray their nature; we call them dark because we can’t see them and don’t know what they are. Recently, though, the European Space Agency (ESA) launched their shiny, new Euclid telescope to investigate those most mysterious parts of the universe. It just sent back its first pictures.
@inkican
Dark matter looks like nothing, because that’s what it is. Euclid will see a lot of things, but not dark matter. It is not a substance, it is a descriptive term for a breakdown in Newton-Einstein Gravitational Dynamics.
The new dynamic is the Milgromian Gravitational Dynamic.
https://scitechdaily.com/conclusive-evidence-for-modified-gravity-collapse-of-newtons-and-einsteins-theories-in-low-acceleration/?expand_article=1&expand_article=1
Incidentaly, this is not science fiction.