# Greatest Ideas

## Gravity

Sir Isaac Newton published Principia Mathematica in 1687 – it explained laws of motion, the universal theory of gravity and developed concepts of calculus. It revolutionised how we viewed the world – for example, understanding that the moon revolved around the earth because the earth had a greater mass and therefore greater gravitational pull. Newton was the founding father of modern physics and his work provided a template for future physicians and mathematicians for the next couple of centuries.