National Geographic is running a challenge for users to submit photos that "celebrate the beauty of the planet" for Earth Day ...

His photos appear frequently in National Geographic magazine ... but willing overexposure. Free and abundant overexposure, without guilt or shame. I was about to become a heretic!

The project engages students in the classroom through free educational ... social networks. The Photo Ark is working to save species at risk. Building on National Geographic’s 129-year history ...

National Geographic shared with us the winners and honorable mentions for each category. Places Honorable Mention: “Flying Kites” Honorable Mention “Flying Kites” Photo and caption by ...