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The First Americans
Petroglyphs at an ancient Native American site. Nearly all of today's Native Americans in North, Central and South America can trace part of their ancestry to six women whose descendants immigrated around 20,000 years ago, a DNA study suggests. |
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Pharaonic Boat Found Buried for the Afterlife
Planks were buried beside the Great Pyramid to be reassembled, Ikea-style, into a boat. 
Northern Lights, Explained
The eerie flickering of the Aurora Borealis is caused by explosions of magnetic energy, say astronomers. 
Cassini's Magical Saturn Tour
Since it arrived at Saturn in 2004, the Cassini space probe has sent home more than 150,000 images. 
California's Native Species on the Move
Bad news for wildflower watchers: California's endemic species have less breathing room than ever. 
Mars Phoenix on Ice
The latest images from the Mars Phoenix Lander reveal its icy platform below. 
Mars Phoenix Delivers First Pictures
View images relayed to Earth by the Mars Phoenix Lander. 
Secrets of a Colossal Squid
Scientists at the Museum of New Zealand inspect the largest squid ever found. 
Galaxy Smash-Ups Revealed in New Images
Colliding galaxies are revealed by the Hubble Space Telescope. 
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