Cosmic expansion could soon reverse

After nearly 13.8 billion years of continuous expansion, the universe could soon swing to a standstill, and then slowly begin to shrink, according to new research published in the journal Science. Proceedings of the National Academy of Sciences It suggests.

In the new paper, three scientists attempt to model a nature dark energy A mysterious force that appears to be causing the universe to expand faster – based on previous observations of cosmic expansion. In the team’s model, dark energy is not a constant force of nature, but an entity called substance, which can decay over time.