Photo of the Day

The eye of a caimen up close.
August 31, 2015, 4:53 p.m.
Take a close look, and see if you can get this multiple-choice question right.
A walrus in the ocean at sunset.
August 27, 2015, 10:54 a.m.
Researchers are trying to figure out where walruses are going and how they are faring without their usual resting spots of sea ice.
Horseshoe Bend is a famous and favorite spot in the Grand Canyon, a place increasingly under threat from development and pollution.
August 26, 2015, 1:45 p.m.
One of the world's most loved natural wonders is getting its fill of pollution.
Milky way in desert.
August 25, 2015, 12:12 p.m.
Several times a year you can view one of the most amazing shows the sky has to offer.
A puffin rests on a rock perch.
August 21, 2015, 11:46 a.m.
This colorful bill is just full of surprises.
Two arctic wolves in zoo.
August 20, 2015, 1:27 p.m.
Wolves are some of the most loving, loyal and devoted family animals on the planet.
A goldfinch sits on a flower in a garden.
August 19, 2015, 10:38 a.m.
Creating a garden of bird-friendly plants has several colorful advantages
Tundra flowers in Alaska at sunset.
August 17, 2015, 12:03 p.m.
In the spring and summer, the seemingy barren arctic tundra comes alive with colorful flowers.
A gorgeous sunset scene at a beach on California's central coast.
August 14, 2015, 11:55 a.m.
It happens every day, and yet few of us know that a tide is really just a big wave.