Study challenges Lambda-CDM model, suggesting variable dark energy in the universe.

A groundbreaking study suggests we may live in a variable universe where dark energy, accelerating the universe's expansion, could fluctuate over time. This challenges the Lambda-CDM model, which posits dark energy as a constant force. A new detailed map from the Dark Energy Spectroscopic Instrument hints at dark energy's variability, questioning assumptions about the universe's formation and expansion.