The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody.

This is the Q&A video for Idea #16, "Gravity." We cover some of the inspiration for general relativity (the Principles of Equivalence and Mach), and do quite a bit more on black holes, including the information-loss puzzle.

My web page: http://www.preposterousuniverse.com/

My YouTube channel:    / seancarroll  

Mindscape podcast: http://www.preposterousuniverse.com/p...

The Biggest Ideas playlist:    • The Biggest Ideas in the Universe!  

Blog posts for the series: http://www.preposterousuniverse.com/b...

Background image: Astronaut Bruce McCandless floating in space, NASA. https://www.nasa.gov/astronautprofile...

#science #physics #ideas #universe #learning #cosmology #philosophy #gravity #generalrelativity #einstein #spacetime