This post is more of a PSA than anything else. Some months ago I was turned onto the website Khan Academy from someone/somewhere (quite likely 2p2) and it is one of the most amazing websites out there. The general premise is that this one guy, Salman Khan, creates and publishes lectures on literally hundreds of topics. The topics range from the most basic (basic addition in math) to far more advanced (physics, chemistry, finance, history). His method of discussing and teaching is extremely simplistic and he makes it easy for anyone to understand even the most difficult concepts. But enough of me trying to explain what’s on the site, here’s a video where Salman presents an overview of the Khan Academy:

[youtube=http://www.youtube.com/watch?v=dsFQ9kM1qDs&feature=player_embedded]

I’ve been watching videos from photosynthesis to cosmic background radiation to the radius of the observable universe and can’t get enough of the site. I highly highly recommend checking it out; it’s great for when you have 10 minutes to spare while waiting for something or you want to brush up on a particular topic for whatever reason, or if you’re just plain bored and want to do something to enhance your mind.