Yosemite.3

Actual Elapsed Time: 3.5 hours (13,000 seconds)

Shadows quickly cover Yosemite Valley. Normally, we can't see shadows change over the course of a day. But by speeding up the action 1,000 times, the passing from day to night is clearly seen. At first glance you might think that the changing shadows are caused by the sun's movement across the sky. But in fact, it is the Earth that is moving, spinning away from the sun's light.

How This Clip Was Made:

This time-lapse video was created by shooting 3.5 hours of regular video. Only 1 of every 1,000 frames of video was digitized and transferred to a computer. When displayed, the remaining frames show the action at 1,000 times normal speed. Production: Bob Hone. Post-Production: Brennan Doyle.

Related Clips:

Yosemite.1 - Actual Elapsed Time: 1 minute (60 seconds)

Yosemite.2 - Actual Elapsed Time: 17 minutes (1,000 seconds)