Gamma-ray burst may prove Einstein wrong The only constant, they say, is change. That may be true on the cosmological level, too, if new findings about the nature of dark energy withstand scrutiny from the scientific community. NewScientistSpace reports that "controversial new calculations suggest" that dark energy -– "the mysterious force that drives the acceleration of the universe" –- changes over time. If this is true, then Einstein's notion of a "cosmological constant" could be disproved, and dark energy, which now repels space, perhaps once drew it together.