Dark matter and dark energy dominate our universe. They’re both highly mysterious, invisible and difficult to detect. So what are they, and how do we know they even exist?

00:00 What is the universe made of?
01:53 What is dark matter?
05:32 What is dark energy?
08:54 The future of the universe

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How astronomers know “dark matter” exists: https://econ.st/3Za8Pu3

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Did dark matter do in the dinosaurs? https://econ.st/3jCkl0M

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The world’s most pointless rocket was launched: https://econ.st/3vxEFmD

NASA’s planetary defence test worked 25 times better than hoped: https://econ.st/3vvzow9