At the end of 2007, teacher Turtle Haste's eighth-grade class at James Monroe Middle School in Albuquerque, New Mexico reported on a project to measure sun shadows all over the world, including at several Antarctic stations. to better understand how the Earth and the Sun interact, and how the seasons progress.
The project is going strong, and there is now a call for everyone to join in. There is a new project page up, and also a Google Map that shows recent measurements:
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By Stefan Geens