Why do we care about loop quantum gravity? Is it a viable path to uniting quantum mechanics and general relativity? What does it mean for spacetime to be discrete? I discuss these questions and more in today's Ask a Spaceman!

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Thanks to Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars (http://www.pmsutter.com).