Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Oct 19, 2012
Check out Crash Course: http://www.youtube.com/crashcourse and SciShow: http://www.youtube.com/scishow I am at the conference right now, so I actually can't write a proper description here...but online video education...is good. And exciting. Much love to YouTube for promoting this stuff and much love to all the people below, who everyone should check out.