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Nov 19, 2015 08:48 AM ET // AFP
The gem is second in size only to the Cullinan diamond unearthed in South Africa in 1905.
Oct 13, 2015 11:00 AM ET // Amanda Onion
A babbling river on Mars may have pushed pebbles along for some 30 miles -- according to new analysis of images taken by the Curiosity rover.
Sep 19, 2015 10:00 AM ET // Discovery News
Route setters armed with drills search for untouched cliffs and boulders and design new paths for climbers.
Aug 7, 2015 09:00 AM ET // Larry O'Hanlon
A mysterious group of delicately balanced rocks that should not exist has led to a revelation about the San Andreas Fault. 
Aug 7, 2015 08:48 AM ET // Patrick J. Kiger
Bolts from the sky can have an effect that was previously thought only to be created by a meteorite striking Earth. →
Jul 29, 2015 08:17 AM ET // Mike Wall,
NASA's Mars rover Curiosity went out of its way to investigate a rock the likes of which it has never seen before on the Red Planet.
Mar 30, 2015 08:50 AM ET // Sheila M. Eldred
Both the North side and South Col of Mt. Everest are dangerous -- but in different ways.
Jun 5, 2015 02:30 PM ET // Patrick J. Kiger
This assortment of monoliths represent some of the biggest rocks on Earth.
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