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In North America, when the first white traders and trappers arrived, there were as many as 400 million beavers. By 1900, there were perhaps 100,000. For three centuries they were trapped for their ...
As NATO readies for what some believe is a new Cold War with Russia, the seventy-year-old alliance struggles to manage widening internal divisions.
Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.
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