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Researchers warn of nitrogen hazard to environment
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While carbon dioxide has been getting lots of publicity in climate change, reactive forms of nitrogen are also building up in the environment, scientists warn.
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El Nino may have helped Magellan cross the Pacific
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The El Nino phenomenon that has puzzled climate scientists in recent decades may have assisted the first trip around the world nearly 500 years ago.
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Da Vinci to be honored by small helicopter flight
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A Japanese man who developed the world’s smallest helicopter will take flight in the birthplace of Leonardo da Vinci in tribute to the Renaissance genius’ original idea.
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US lists polar bear as threatened species
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Put at risk by global warming, the polar bear is getting a life line as the government officially has declared it a threatened species in need of increased protection. But another round of legal battles surrounding the majestic animal may be just beginning.
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