Dark Energy that is responsible for our universe to expand at an accelerating rate forms around 68% of the universe. Dark Matter on the other hand that is responsible for the formation of our ordered galaxies in this chaos of expanse, forms around 27% of the universe. They together are two most famous and mysterious known-Unknowns that we know of. That means, if we take everything from our daily experience, everything that we know about, it's made of atoms and all of that adds up to only 5 percent of the universe. Our reality is not what actually reality seems to be.