Now that you know about the sun, do you want to learn about quantum tunneling? http://bit.ly/p7l3gv Sorry I'm late - I was busy working on freddiew's new video: http://bit.ly/n73Uwj minutephysics is now on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics Tweet it! - http://bit.ly/nRmI7m Facebook it! - http://on.fb.me/nzRurH Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! In this episode, we learn about how the sun can burn for billions of years without running out of fuel. Music by Nathaniel Schroeder youtube: http://bit.ly/pakJLE myspace: http://mysp.ac/qtmZQj Created by Henry Reich