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In conjunction with this summer's special exhibition Reflections, Exploratorium Senior Scientist Paul Doherty joins us for a hands-on Webcast. What effect does looking through two mirrors have on an image? Or three mirrors?

What's Christmas like at the South Pole? Also learn about the Race Around the World and the installation of the telescope's new receiver.

In this zany competition teachers will have ten minutes to create a science activity from a special secret ingredient. This week: mirrors!