Inside KSC News Feeds
06-17-2009, 02:09 PM
The oldest material on Earth which has yet been dated by man is a zircon mineral that is 4.4 million years old and comes from a sedimentary gneiss in...
More... (http://www.nasa.gov/multimedia/imagegallery/image_feature_1390.html)
More... (http://www.nasa.gov/multimedia/imagegallery/image_feature_1390.html)