These Incredible Gravity Defying Things Will Make You Look Twice

Similarly, the less gravity there is, the faster time passes, a phenomenon known as gravitational time dilation. For instance, a clock aboard an orbiting satellite advances slightly faster than a counterpart on Earth's surface. While Einstein's theory brought gravity up to speed with modern science, we still don't know everything about gravity. Some scientists attribute gravity to hypothetical particles called gravitons, which -- in theory -- cause objects to be attracted to one another.