Ashley Jean Yeager is associate news editor at Science News. She has written for Quanta, Science News, Nature, Astronomy, Sky & Telescope, The Scientist, and other publications.
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We now know that the universe is mostly dark, made up of particles and forces that are undetectable even by our most powerful telescopes. The discovery of the possible existence of dark matter and dark energy signaled a Copernican-like revolution in astro... SEE MORE