Take a quiz to see how cleverly these flightless birds have adapted themselves to life on earth's least hospitable continent.
Jun 4th, 2008 | 43 comments | 16,245 Views

Take a quiz to see how cleverly these flightless birds have adapted themselves to life on earth's least hospitable continent.
A glacier is a slow-moving flow of ice and snow. Explore the anatomy of a glacier in this interactive feature.
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