Being from the South I had no idea how snow was cleared from train tracks. Very cool video showing just how it's done.
Or Amazing Grace Christmas lights I should say. I'd be curious how much their electric bill runs.
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.
I think this video shows it best!
Here's a video taken of earth from 31 million miles away by NASA's EPOXI Deep Impact satellite.
During a full Earth rotation, images obtained by Deep Impact at a 15-minute cadence have been combined to make a color video. During the video, the moon enters the frame (because of its orbital motion) and transits Earth, then leaves the frame.