We spoke with theoretical physicist Brian Greene about Einstein’s theory of space-time. Many scientists believe space-time is a fundamental concept. But Greene thinks there might be something deeper to space-time than meets the eye.

Greene is the co-founder of the World Science Festival, which has a new initiative called “City of Science” which is a 5-event series. All events will take place in one of New York City’s five boroughs throughout this fall.

Watch Brian Greene’s interview with Business Insider to the left.

“City of Science” is free and open to all New Yorkers of all ages. Learn more about where and when it will take place here. You can also follow the events on Facebook, Twitter, and Instagram.