Biologist/blogger PZ Myers provides a nice introduction to evolutionary theory, and explains how classical Darwinism is distorted by proponents of scientific racism and other pseudoscientific movements.
The van goes forward, the balloon goes--wait a second. But truly, the cool balloon physics is the least terrific thing about this video. From Smarter Every Day. [slyt | via] Previously and previouslier
NASA Johnson Style (Yes, it's a Gangnam Style Parody, but it's a pretty damn good 'un) SLYT
Garden of Your Mind: Mister Rogers Remixed
Asteroid Discovery From 1980 - 2010: an animation of the solar system that highlights asteroids as they are discovered. I would suggest watching it in a high resolution.
C0nc0rdance [sytl] asks; How far should we trust common sense? A less than 9 min video on Common Sense as it relates to Science. Enjoy.
SLYT: Professor Savage shows how the density of various gases will affect your voice in different ways... the fun way (by inhaling them). [more inside]