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Building the Great Cathedrals. How did medieval engineers construct magnificent skyscrapers of glass and stone? Airing December 23, 2015 at 9 pm on PBS ...
Earth's ancient oceans were rife with nightmare creatures, from many-limbed worms to six-foot-long crab-ancestors. This week, scientists are taking the prehistoric ...
Syria Meets Deadline for Submitting Destruction Plan for Chemical Weapons. New York Times. October 27, 2013. By NICK CUMMING-BRUCE and MICHAEL R. GORDON
Thousands of years ago, indigenous people living in the California Channel Islands relied on a manufacturing process that exposed them to dangerous chemicals that ...
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