Original source: metafilter.com
Many of Pixar’s films can seem like magic, and while much of that relies on storytelling, the art of animation has many, many, many skills in it. Pixar has partnered with the Khan Academy to provide a free practical introduction to how the best-of-the-best do their job. Because who doesn’t want to understand how you simulate hair?
Note: The original Metafilter article contains links that I have not reproduced here.