When it comes to what makes up the universe, you and everything you know — spatulas, Segways, supernovas, et cetera — are in the minority. Only five percent of the universe is made up of "normal" matter, or the stuff we can see and identify. A much larger portion is comprised of dark matter: a mysterious substance that we can only detect by its gravitational force. Everything in the universe we know about can be broken down into quantum particles, and (most) scientists believe that dark matter is no different. They just need to find the dark matter particle. Here are six candidates that have been nominated for that role — some of them more convincingly than others.
Written by Ashley Hamer July 9, 2019
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