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Aug 18, 2014 01:00 PM ET // Paul Heltzel
A gorge formed by an earthquake and a violent river arrived quickly and could be gone in 50 years.
Oct 7, 2011 05:52 AM ET // Tim Wall
The cooling effect of the moon's shadow can cause atmospheric waves that travel about 100 meters (328 feet) per second.
Jun 13, 2011 11:43 AM ET // Tim Wall
A 'trash' boat made of all recycled parts set sail around Taiwan last week.