"Astronomers estimate that roughly 85% of all the matter in the universe is dark matter, meaning only 15% of all matter is normal matter. Accounting for dark energy, the name astronomers give to the accelerated expansion of the universe, dark matter makes up roughly 27% of all the mass energy in the cosmos, according to CERN (opens in new tab) (the European Organization for Nuclear Research)."
https://www.livescience.com/how-much-dark-matter-universe
"The aether was the invisible material thought to permeate all the empty space in the universe, used by famous thinkers from Aristotle to Isaac Newton to explain the mysteries of the natural world."
https://www.popularmechanics.com/science/energy/a23895030/aether/
"The aether, it was assumed, was the medium inherent to space that all objects, from comets to planets to starlight itself, traveled through."
https://www.forbes.com/sites/startswithabang/2020/02/29/ask-ethan-does-the-aether-exist/?sh=615e82f566ea
"space and time is single entity called spacetime. We treat spacetime as a smooth fabric which is distorted by presence of energy.Thus the term the fabric of space and time."
https://physics.stackexchange.com/questions/223041/what-does-the-fabric-of-space-and-time-actually-mean