Is Einstein's 'Theory of Happiness' as Successful as General Relativity?

This autographed photo of Albert Einstein with his tongue out was sold at auction for $125,000.
This autographed photo of Albert Einstein with his tongue out was sold at auction for $125,000.
(Image credit: Arthur Sasse/Nate D. Sanders Auctions)

In 1915, Albert Einstein published his General Theory of Relativity, arguing that the universe consists of a fundamental fabric: spacetime. Moreover, he said, this fabric is warped by massive objects. The resulting bending and curving explains what we perceive as gravity.

More than one hundred years later, general relativity has proven to be the most successful framework for understanding the universe, guiding scientists to black holes, time dilation, and gravitational waves, as well as countless other discoveries.

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