Brian Greene is a professor of math and physics at Columbia University who is a leading researcher in superstring theory. In his talk, he discusses how many aspects of the universe can be measured but not explained. Superstring theory proposes that there are even smaller filaments of energy called strings that vibrate in different patterns to cause the different particles in the universe and explain what the universe is made of at the most fundamental level. Superstring theory could explain gravity and other fundamental forces by proposing that these strings exist in additional dimensions beyond the three that we can observe.