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The contents of the universe

08/09/16

By Amanda Solliday

How do scientists know what percentages of the universe are made up of dark matter and dark energy?

Cosmologist Risa Wechsler of the Kavli Institute for Particle Astrophysics and Cosmology explains.

Ask Symmetry - Dark Matter and Dark Energy

Have a burning question about particle physics? Let us know via email or Twitter (using the hashtag #AskSymmetry). We might answer you in a future video!

You can watch a playlist of the #AskSymmetry videos here. You can see Risa Wechsler's answers to readers' questions about dark matter and dark energy on Twitter here.

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