Physics Girl: This Thing Is -270°C and Is EVERYWHERE

9 minutes 29 seconds

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Now Playing As: Captioned (English) (change)

In this episode, host Dianna Cowern explores one of the most mysterious discoveries in physics from the 1960's: a constant microwave signal that seemed to be coming from everywhere in the universe. It turned out to be light from an unusual process 13.8 billion years ago and originated from the beginning of the universe. Part of the "Physics Girl" series.