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What is the Earth's average temperature?

Earth is the only planet in the solar system where life is known to exists. Note the use of the word "known", which is indicative of the fact that our knowledge of the solar system is still in its infancy, and the search ...

dateAug 19, 2015 in Earth Sciences
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Air controller study shows chronic fatigue

Air traffic controllers' work schedules often lead to chronic fatigue, making them less alert and endangering the safety of the national air traffic system, according to a study the government has kept secret for nearly four ...

dateAug 10, 2015 in Other
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