Twenty-seven percent of the Universe is made of invisible dark matter. But what is it? In this episode, we cover the top five candidates that may fit the bill.
Host/writer: Sophie Bushwick
Production assistant: William Herkewitz
Editor: Kathryn Free
Producer: Eric R. Olson
April 27, 2016 — Reuters
April 26, 2016 — Benjamin Meyers and Jason G. Goldman
April 25, 2016 — Reuters