China's spectacular feathered fossils have finally answered the century-old question about the ancestors of today's birds
The discovery of the saola alerted scientists to the strange diversity of Southeast Asia's threatened forests
The discovery of a 4,300-year-old skeleton surrounded by intriguing artifacts has archaeologists abuzz
Who built them and why? An amateur archaeologist tries to get to the bottom of some astonishing structures in Tibet and Sichuan Province, China
In the former Soviet Union, "rad rangers" are racing to find lost radiation devices before terrorists can turn them into "dirty bombs"
In what may be the world's largest lake ever seen by a human eye, the search begins
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