These Incredible Gravity Defying Things Will Make You Look Twice

The field has helped scientists develop the standard model of particle physics, which details most of the inner workings of the universe -- with one notable exception. The standard model doesn't explain gravity. So while quantum theory and relativity together explain most of the observable universe, they also contradict each other at times, such as in the study of black holes or the early universe. Not surprisingly, numerous scientists continue to work toward a unified theory.