Dark matter and dark energy

What is this dark entity?

Initially when big bang happened it led to the formation of matter along with dark matter, evidence or existence of dark matter is not confirmed yet but 95% of the whole energy-matter composition is of dark matter in the universe, only 5% of the cosmos contains ordinary energy-matter.

After big bang happend the impact caused the universe to expand and accelerate very fast, but it was predicted that the expansion would eventually stop due to the phenomenon of gravity ( consequence of spacetime warping)but as time passed the universe has been expanding (accelerating)and never stopped , here comes the action of dark matter and energy . Dark matter is behaving opposite to ordinary matter and is repelling ordinary matter which comes in contact , leading to expansion of universe in an accelerating rate.

Dark energy is helping in driving this expansion of the universe .

Dark matter behave in a very peculiar manner it does not radiate any form of energy nor react to any form of radiation except to gravity , its physical properties are very hard to detect hence it's identity has been hidden from It's birth.

Note-I would suggest that don't confuse this dark matter with antimatter. Because same amount of matter and antimatter were formed during bigbang .