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 Idea #5, "Time." We talk about what time is, whether it's "real," and about why it seems to move in just one direction. That gets us a bit into entropy, which is a teaser for a later video in the series.

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: In...  

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

Background image: https://commons.wikimedia.org/wiki/Fi...

#science #physics #ideas #universe #learning #cosmology #philosophy #math #time