Dark matter is sort of a cosmic scaffolding, holding galaxies together through sheer abundance, and since it only interacts with matter gravitationally, you cannot see it, and nor can you detect it....yet.
Matter.
Buoyancy is related to matter because it uses solids and liquids.
That refers to the amount of space it uses.
Mechanical waves
The type of material you use for the project doesn't matter; what truly counts is how well you execute it.
By affecting mass
A telescope is the instrument an astronomer uses to study matter in space.
An organism the uses oxygen in metabolism and consumes animal and plant matter.
Not in large enough amounts to matter.
he uses emotional movement comic pictures
they uses their brains for that matter.
As of yet, way too little is known about dark matter to speculate about any practical uses.