NPR News: Natasha Hurley-Walker: How Do Radio Telescopes Reveal The Universe We Can't See?

Natasha Hurley-Walker: How Do Radio Telescopes Reveal The Universe We Can't See?
Natasha Hurley-Walker explains how a new radio telescope helps us "see" without light. She says these telescopes can tell us about millions of galaxies — and maybe even the beginning of time.

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