Check out some of the items that have recently captured George Knapp's attention, including this photo by NASA's Spitzer Space Telescope of a glowing emerald nebula reminiscent of the ring wielded by the superhero Green Lantern:
Argentinean Air Force launches new UFO commission
Visiting 10 of the Most Interesting Abandoned Places
Why Google Earth Can't Show You Israel
I-Team: Las Vegas Inventor's Ideas Take Shape
A Green Ring Fit for a Superhero
10 New Alien Planets a Diverse Bunch
Roswell UFO museum's fascinating space