Technology
Sunlight could power micro-aircraft flying above the stratosphere
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Krista Charles
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Environment
Strange death of Russian mountaineers may be due to unusual avalanche
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Humans
Our dexterous thumbs have a 2 million-year-old origin
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Environment
Tropical rainforests may begin pumping out carbon dioxide by 2050
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Life
Snakes make their bodies lassos in a strange new climbing technique
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Question
How old is Earth?
Humans
People in the Mediterranean ate foods from Asia 3700 years ago
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Environment
Eastern Alps may have been ice-free in the time of Ötzi the Iceman
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Life
New species are more likely to evolve in areas where few already exist
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Life
Crabs with an appetite for seaweed could save Caribbean coral reefs
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Environment
Mass of artificial objects on Earth may now outweigh living things
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Life
Orca deaths found to be a result of human activity
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