Astronomers studying the largest-ever map of the cosmos have found hints that our best understanding of the universe is due a major rewrite.

Ian Randall is Newsweek's Deputy Science Editor, based in Royston, U.K. His focus is reporting on science and health. He has covered archeology, geology, and physics extensively. Ian joined ...

The Dark Energy Spectroscopic Instrument (DESI) is mapping millions of celestial objects to better understand dark energy—the mysterious driver of our universe's accelerating expansion.

There is growing evidence in cosmology that so-called dark energy is not constant, but changes “in unexpected ways” over the course of time. This has now been announced by the research team ...

The Dark Energy Spectroscopic Instrument (DESI) is mapping millions of celestial objects to better understand dark energy: the mysterious driver of our universe’s accelerating expansion.