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This phenomenon was first predicted by Albert Einstein in his magnum opus theory of how gravity works, general relativity, back in 1915, and is still a key tool for astronomers exploring the universe.—Robert Lea, Space.com, 30 Mar. 2026 The Shapes of Space-Time In 1915, Albert Einstein’s theory of gravity, called general relativity, introduced the idea that space and time are inextricably linked.—Shalma Wegsman, Quanta Magazine, 30 Mar. 2026 All these topologies share the same geometry, which means general relativity treats them exactly the same.—Paul M. Sutter, Scientific American, 27 Mar. 2026 But the lessons from the generalized version of special relativity — general relativity — which includes gravitation, goes well beyond our Solar System.—Big Think, 12 Mar. 2026 See All Example Sentences for general relativity