Dark energy makes up almost 70% of our universe and is believed to be the reason the universe is expanding. Yet very, very little is known about it. To figure out what we do know ā and what it could tell us about the fate of the universe, we talked to astrophysicist Sarafina Nance. She studies cosmology, a field that looks at the origin and development of the universe.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy
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