Dark energy, an enigmatic force underpinning the accelerating expansion of the universe, has captivated astronomers and cosmologists alike as researchers strive to unravel its mysteries.Recent findings from the groundbreaking Dark Energy Spectroscopic Instrument (DESI) collaboration, which engages over 900 scientists globally including those at Harvard, suggest that this elusive energy, often equated with the cosmological constant, may be diminishing over time.