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#359 – Andrew Strominger: Black Holes, Quantum Gravity, and Theoretical Physics
Lex Fridman Podcast
Is Space Time Curved?
Astronomers think that on large scales, even though for thousands of years we hadn't noticed it beginning with Hubble, we started to notice that space time was curved spaces expanding in time means that space time is curved. The nature of this curvature is affected by the matter in it, because matter itself causes the curvature of space time. But as it expands, the matter gets more and more diluted. And one might ask when it's all diluted away is space time still curved? astronomers believe they've done precise enough measurements to determine this.
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