General Relativity: The comic book

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Science  06 Mar 2015:
Vol. 347, Issue 6226, pp. 1094-1095
DOI: 10.1126/science.347.6226.1094

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In 1915, Albert Einstein explained that the force of gravity arises when mass and energy warp space and time, or spacetime. Freefalling objects then follow the straightest possible paths, or geodesics, in that warped spacetime, which to us appear as the arcing trajectory of a thrown ball or the elliptical orbit of a planet. Einstein labored for years to translate this notion into a mathematically consistent theory. But anybody can understand how Einstein arrived at the basic idea. All we need to do is to follow his mental footsteps—which led him up an imaginary building and off of its roof. Bring your cape and take the plunge!