Nova - Season 38 Episode 15 -
The Fabric of the Cosmos: What is Space? (1)
Brian Greene reveals space as a dynamic fabric that can stretch, twist, warp, and ripple under the influence of gravity. Stranger still is the newly discovered dark energy, an ingredient of space that makes up 70 percent of the universe.but scientists have no idea what it is.
Please explain the problem in a few words.
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Max 255 characters.