Legend has it that Isaac Newton had the moment of inspiration that would lead to his theory of gravity when, on a warm afternoon, he saw an apple fall from a tree and wondered why it should fall down ...

What could be more familiar than gravity? Drop something and gravity pulls it to the floor, right? And in school we learn that gravity is what guides the moon in orbit around Earth, and Earth in its ...

Physics is this close to understanding the entire universe. And what lives in this gap? Many physicists think it’s the ...

The gravitational constant is the key to unlocking the mass of everything in the universe, as well as the secrets of gravity. When you purchase through links on our site, we may earn an affiliate ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...