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Tributes flow after death of former Singapore president S.R. Nathan

Here's how hot your city will be by the end of the century

NASA concept video shows how we might save Earth from rogue asteroids

Instagrammers are staging fake camping pictures, and this account is calling them out

Researchers create temporary tattoos you can use to control your devices

Sick of nightmarish flight neighbors? This airline lets you bid on the seats near you