Dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
Dead stars called magnetars create fast radio bursts, giving us insights into dark matter dark matter.
A simulation shows how the existence of habitable galaxies depends on dark matter.
Einstein's theory of general relativity was not always considered correct. It wasn't until Hubble made a grand discovery that the equation was fixed.... or was it? Some scientists believe the equation should actually go back to it's original form due to dark energy.