We think dark energy makes up most of the universe, but we don't know what it actually is. In 2025, the Dark Energy Spectroscopy Instrument (DESI) in Arizona may provide clues about how this strange force has changed, especially as the universe matures.
“There could be a new form of dark energy that we don't know about yet, or this could be a paradigm shift. [the data will show] “There's something about space and time that we don't understand,” he says…
Source: www.newscientist.com