Dark matter
Unsolved problem in physics:
What is dark matter? How was it generated?
In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field. Wikipedia
People also ask
What is dark matter in simple terms?
Is there dark matter in humans?
Does dark matter still exist?
Is dark matter a black hole?
Dark energy makes up approximately 68% of the universe and appears to be associated with the vacuum in space. It is distributed evenly throughout the universe, ...