Here's a conundrum: scientists can only identify 5 percent of the matter in the universe. The rest is what they call "dark"—unobservable stuff that we know is there, but we don't know the nature of. 68 percent of the universe is made up of so-called dark energy, which we think is driving its expansion. The other 27 percent is what's known as dark matter, which exerts an invisible but impressive gravitational pull. Scientists have a hunch about what dark matter actually is, and they think they've figured out a way to detect it. How? Really huge vats of an element called xenon.
We All Need Somebody To Xenon
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Watch And Learn: Our Favorite Content About Dark Matter
How Do We Find Dark Matter?
What is Dark Matter and Dark Energy?
Key Facts In This Video
The known universe consists of about 70% dark energy, 25% dark matter, and 5% visible matter. 00:08
Dark energy seems to be intrinsic to empty space, which has more energy than everything else in the universe combined. 03:45
One theory of dark energy postulates that it comes from virtual particles in empty space that form and disappear constantly. 04:47
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