Under Sahara

http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16963

How does a scientist know that the vast, featureless sand fields of the
Sahara once ran with water? Water leaves its mark on the land, cutting
channels and canyons where rivers flowed and leaving depressions where
lakes once pooled. In the Sahara, however, these features are filled with
sand. A scientist would have to look under the sand to find the imprint of
water from wetter climates. These images of the Safsaf Oasis in
south-central Egypt do just that: the top image shows the surface of the
desert, while the lower image reveals the water-carved rock under the
sand.

Author: Jorah

I grew up in New England, did a short stint in the U.S. Navy after high school, worked in various factories, built & renovated houses, and finally moved to the Carolinas in 1998 to start working at what was then a large regional bank and is now a really big nationwide bank. I work doing SharePoint management site management. After work I make soap, knit, ride my motorcycle, read, watch movies & eat. I ride a Yamaha V-Star 1300. I am pretty sure that I want to hike the Appalachian Trail someday, or possibly do a long-distance rowing trip. I'll be retiring in a few years, and hope to run a craft soap-making business to bring in some cash.