Satellites build a picture of the past

"When NASA's only archaeologist, Tom Sever, looked at an infrared satellite image of a Mayan city in Guatemala, he was intrigued to see the vegetation around the buildings showed up as much brighter than the vegetation in other areas. Following a hunch, Sever, based at the Marshall Space Flight Centre in Hunstville, Alabama, looked for other patches of bright vegetation on the U.S. space agency's maps.

Sure enough, he found additional bright spots at sites not previously considered for archaeological digs.

Sever hypothesised that the limestone that the Maya used for building had leeched into the soil, altering vegetation at these sites. Since chlorophyll in plants glows brightly in the infrared range, NASA's satellites were able to pick up the subtle difference in vegetation. With this new method in their toolkit, archaeologists went on to discover several previously unknown Mayan cities."

http://www.cosmosmagazine.com/node/1764

Hot tips to get the best of Linux in 2008

"At the onset of this new year - 2008 - I would like to share some Linux tips with you. It won’t matter which version are you using because I’ll talk mostly about the Linux Console. Most common windows user will probably feel the console in Linux to be a little intimidating, nevertheless when the time comes, you’ll notice that it is the best way to be highly productive."

http://www.brajeshwar.com/2008/hot-tips-to-get-the-best-of-linux-in-2008/

GNU/Linux Desktop Survival Guide

"This book is Copyright and is made available in the hope that it serves as a useful resource for users of GNU/Linux in general and Debian in particular. The procedures and applications presented in this book have been included for their instructional value."

http://www.togaware.com/linux/survivor/

LinuxHaxor.net - 68 Linux Related Free E-books

http://www.linuxhaxor.net/2007/09/05/68-linux-related-free-e-books/