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

In honor of Earth Day and the photographers who make our Earth more accessible, National Geographic is having a flash sale for six days ... the story behind each photo.

Guests can now pose for photos at the National Geographic photo-op for "Secrets of the Penguins" at Disney Springs in Walt Disney World.

His photos appear frequently in National Geographic magazine. "I'm going on vacation. What lens should I take?" Well, now, that's a simple question, and I ought to able to give a simple answer.