Speaker
Tamara Davis
Description
Based on 6 years of observations and ~1,500 new high-redshift supernovae, the Dark Energy Survey (DES) team presented tentative evidence in 2024 that dark energy may be changing with time. A few months later the Dark Energy Spectroscopic Instrument (DESI) team also presented hints of time-varying dark energy, by mapping the distribution of galaxies. This talk will review the current state of evidence for the nature of dark energy, including recent updates, and discuss the implications time-dependent dark energy would have for fundamental physics and the fate of the Universe.