Science, Maths & Technology
Infographic: 12 things to know about Einstein's Theory of Relativity
...laws were used to understand the physics of motion. In 1687, Newton wrote that gravity affects everything in the universe. The same force of gravity that pulled an apple down from a tree kept the Earth in motion around the sun. But Newton never puzzled out the source of gravity. Philosopher David Hume’s 1738 ‘A Treatise of Human Nature’ was a big influence on...