Grab a cup of hot cocoa and settle in for a chilly display of Earth’s frozen patterns, from cracked Arctic sea ice and a Bavarian ice cave to a frosty windshield and frozen ferns.
Black holes are so small, distant, and dark, they cannot be directly observed. But we know they exist by studying the violent events that occur as objects are drawn into them.
National Geographic Traveler has scoured the globe for the world's most beautiful, interesting, and off-beat road trips. Dive in to get drive directions, quizzes, photos, and more.
Get great tips on digital photography with images that show you how to ensure better compositions, take better close-ups, and more with your digital camera.