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May 2, 2014 06:00 AM ET // Denise Chow, LiveScience
The ancient Egyptians who built the pyramids may have been able to move massive stone blocks across the desert by wetting the sand in front of a contraption built to pull the heavy objects, according to a new study.
Feb 12, 2013 06:27 PM ET // Rossella Lorenzi
Pope Benedict XVI's abrupt resignation raises questions about why he's stepping down. ->