Pixlr is a free and probably the best web based image editor. I will show you how to open and and resize an image, I'm sure you will be impressed how well the web app actually works.
Errors on the hard disk on your Mac OS X computer can be the cause why the computer doesn't run as fast as it used to. Let me show you how to check and repair the errors on a disk drive.
Mars is the most explored and well know planet so far, so you shouldn't have to much trouble knowing some of its facts. Go through this short quiz and build up you Dreevoo knowledge profile.
Check out this electromechanical exoskeleton made by Japanese manufacturer Sagawa Electronics. The 7 feet tall and 55 pounds light, wearable construction is made of aluminum and carbon fiber.