What Is Dark Energy? Physicists Aren't Even Sure

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 — 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. See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences.NPR Privacy Policy

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