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The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked it. The second amazing thing about gravitation is how weak it is.

The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked it. The second amazing thing about gravitation is how weak it is.

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Author or tradition
Richard P. Feynman
Attribution: attributed
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Supplied reference C; CSV row 460507; supplied attribution, independently unverified

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