Photo of the Day

photo of an Organ Pipe Cactus in the biosphere reserve
September 16, 2019, 2:02 p.m.
The federally protected and UNESCO-recognized wilderness area is front and center in the border wall debate.
Polar bear and cub in the Arctic National Wildlife Refuge
September 16, 2019, 12:55 p.m.
The plan to drill in the Arctic National Wildlife Refuge is hotly contested between oil companies, Alaskans and conservation groups.
A chameleon shows off its beautiful rainbow-colored scales
September 13, 2019, 9:53 a.m.
Scientists take a deeper look at how chameleons change color, and learn some tricks that could benefit humans.
The Flight 93 National Memorial, titled 'Tower of Voices'
September 11, 2019, 10:03 a.m.
National memorial site in Pennsylvania honors the passengers and crew of Flight 93.
blue-tailed skink of Christmas Island, Australia
September 11, 2019, 9:15 a.m.
Scientists are giving the blue-tailed skink of Christmas Island an early holiday gift.
clouds and lightning strikes
September 11, 2019, 8:27 a.m.
These 'superbolts' are more common over water.
Volunteers plant happy little trees in Michigan.
September 9, 2019, 8:26 a.m.
It's a great way to celebrate a 100th birthday.
mother and baby sea otter
September 6, 2019, 1:10 p.m.
Outdoor cats can harm wild animals even if they never cross paths.
A squirrel and a starling sharing a snowy branch.
September 6, 2019, 8:25 a.m.
Squirrels pay close attention to bird chatter to find out if there's a predator nearby.