Some newly reviewed dark energy data may contradict the theory first posed in 1922 by the astronomer Alexander Friedmann. “The new data seem to indicate that the cosmological constant is negative, and that the universe will end in a big crunch,” he said in a statement. The information comes from two major reports released earlier this year: the Dark Energy Survey and the Dark Energy Spectroscopic Instrument. “People have said before that if the cosmological constant is negative, then the universe will collapse eventually. At that point, physics (and that negative cosmological constant) will dictate if it begins to retract towards a single point.