Brief History of the Universe (http://www.astro.ucla.edu/~wright/BBhistory.html)
An Introduction to the Big Bang Theory - Part 1 (http://www.youtube.com/watch?v=0FPUutjtqfw&feature=related)
An Introduction to the Big Bang Theory - Part 2 (http://www.youtube.com/watch?v=8RHfUFljTmw&feature=related)