Even if you didn't get tickets to the World Science Festival in New York, you can still have a live conversation with Brian Greene, exploring how scientists are piecing together the most complete picture yet of space, time, and the Universe. We've got the webcast streaming below. And he'll be taking your questions!

Tune in to the live webcast tonight, Nov. 2 at 10pm ET, and submit your questions live! Or get the conversation going now and ask your questions via Twitter (using hashtag #WSFforum), or submit questions on the World Science Festival Facebook wall.

Held at at Columbia University's Miller Theatre, the event begins at 9 PM with the premiere broadcast of the first episode of NOVA's The Fabric of the Cosmos, followed immediately by a live Q&A hosted by Greene, with special guests including renowned theoretical physicist Leonard Susskind and Saul Perlmutter, winner of the 2011 Nobel Prize in Physics.