Math, Educational, and Just Plain Fun Videos
A Perfect Circle
The World Freehand Circle Drawing Champion shows why he's the champ.
Surface tension is an attractive property of the surface of a liquid. It is what causes the surface of a portion of liquid to be attracted to another surface, such as that of another portion of liquid.
Moon Transits Earth
During a full Earth rotation, images obtained by Deep Impact at a 15-minute cadence have been combined. During the video, the moon enters the frame (because of its orbital motion) and transits Earth, then leaves the frame.
Here's what you can get if you take some old retro computer parts and hook them up to some instruments. The old scanner rocks!