15 Incredible Photos That'll Remind You to Be Awed by Planet Earth
One photo captures the astonishing moment before a wildebeest plunges into a stream in Kenya’s Maasai Mara National Park. And another image chronicles the unlikely escape of a penguin from the looming jaws of a leopard seal.
"The luminous, radiant emission from the upper atmosphere over middle and high latitudes, and centered around the Earth's magnetic poles. These silent fireworks are often seen on clear winter nights in a variety of shapes and colors."