Quantum particles exist in space-time, but quanta of gravity are different - they are woven together to make space time itself. Subscribe for regular science videos: In this short clip from his talk on the Physics and Philosophy of Time, theoretical physicist Carlo Rovelli explains loop quantum gravity, and how space-time is woven together from quanta of gravity, much like how a t-shirt is knitted together from a cotton thread. Watch the full talk: --- A very special thank you to our Patreon supporters who help make these videos happen, especially: Ashok Bommisetti, Avrahaim Chein, Greg Nagel, Lester Su, Rebecca Pan and Will Knott. --- The Ri is on Patreon: and Twitter: and Facebook: and Tumblr: Our editorial policy: Subscribe for the latest science videos: #LoopQuantumGravity, #CarloRovelli, #QuantumPhysics, #QuantumGravityExplained, #TheoreticalPhysics