by National Geographic
January 18, 2011
The alien planet Gliese 581g set off a firestorm of controversy in 2010 when astronomers loudly declared it to be the first truly habitable planet found outside our solar system. One of several planets known to orbit the red dwarf star Gliese 581, the headline-grabbing world was described by one researcher as being “just the [...]
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by National Geographic
December 8, 2010
From The National Geographic Hard-hit by a months-long drought, a waterway within the Amazon Basin trickles to a halt in Manaus, Brazil (see map), on November 19, 2010. The Negro River (right), a major tributary of the Amazon River, dropped to a depth of about 46 feet (14 meters), the lowest point since record-keeping began [...]
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