Robotic Hand #8
Ktsdesign
Environmentally Friendly
Smetek
Space Mandala #14
Sakkmesterke/science Photo Library
Signing Of The Treaty Of Versailles
National Portrait Gallery, Smithsonian Institution/science Photo Library
Apollo 11 Moon Plaque
Nasa/science Photo Library
Prayer Flags
Steve Allen/science Photo Library
Apollo 11 Moon Plaque
Nasa/msfc/science Photo Library
Apollo 11 Moon Plaque
Detlev Van Ravenswaay/science Photo Library
Hand Gestures
Peter Aprahamian/science Photo Library
Austerity
Victor De Schwanberg/science Photo Library
Cuban Missile Crisis Protest, 1962
Library Of Congress