RG

IN CONTEXT

BRANCH

Physics

BEFORE

3rd millennium BCE Metalworkers discover that melting metals and mixing them together produces an alloy that is stronger than either of the original metals.

600 BCE In ancient Greece, coins are made from an alloy of gold and silver called electrum.

AFTER

1687 In his Principia Mathematica, Isaac Newton outlines his theory of gravity, explaining how there is a force that pulls everything toward the center of Earth—and vice versa.

1738 Swiss mathematician Daniel Bernoulli develops his kinetic theory of fluids, explaining how fluids exert pressure on objects by the random movement of molecules in the fluid.

The Roman author ...

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