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Home » Video » NOVA scienceNOW | The Dark Matter Mystery

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NOVA scienceNOW | The Dark Matter Mystery | PBS

Duration: 04:38

We can’t see dark matter, and some skeptics doubt its existence, but many scientists think it makes up 20-some percent of our universe. Astronomer Doug Clowe explains how the Bullet Cluster, a group of galaxies billions of light years away, may shed some light on this mysterious stuff.

Watch past episodes of NOVA scienceNOW, try out interactives, and more on our Web site: www.pbs.org/nova/sciencenow

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Post Date: June 23, 2008