Gravity

A distinguished physicist takes an enlightening look at three scientists whose work unlocked many mysteries: Galileo, the first to examine the process of free and restricted fall; Newton, originator of a universal force; and Einstein, who proposed that gravity is no more than the curvature of the four-dimensional space-time continuum. Gravity rules the Universe. It holds together the one hundred billion stars of our Milky Way; it makes the Earth revolve around the Sun and the Moon around the ...

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