Web/iOS: You can never be too careful when it comes to contagious diseases, and Sickweather feeds the hypochondriac in you by sending alerts when you are near a place where someone has reported an illness.
As earth's population surges, mankind faces an increasingly limited supply of fresh water. Thankfully, Australian scientists report this week that they've found vast new fresh water supplies. Unfortunately, it's in one of earth's least accessible places: under the ocean floor
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On this day in 1972, the Apollo 17 crew snapped this photograph, later dubbed "The Blue Marble." Photographed using a 70-millimeter Hasselblad camera with an 80-millimeter Zeiss lens, and credited to all three Apollo 17 astronauts (Eugene Cernan, Ronald Evans and Jack Schmitt), this rare image of a fully-illuminated Earth has become one of the world's most recognizable photographs. No human has since traveled far enough into space to see such a full view of earth, though similar shots have since been taken by unmanned spacecraft. [NASA History Office; image: Wikimedia]