Photo of the day

South Africa: Elephants have one of the largest life spans of all mammals - living up to 70 years. This image is from Animal Fight Club.

Fresh Crater Near Sirenum Fossae Region of Mars. The High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter acquired this close-up image of a "fresh" (on a geological scale, though quite old on a human scale) impact crater in the Sirenum Fossae region of Mars on March 30, 2015. This image is from Mars.

Reenactment: Crew on bridge of HMS Volunteer (Dramatic Recreation) Adam Gravelle. This image is from WW2 Hell Under the Sea.

Arctic trek to North Pole: (Left to Right) Heading to the North Pole - Paul Hameister, Jade Hameister and guide Eric Philips skiing across an icy stretch of the Arctic. This image is from On Thin Ice: Jade's Polar Dream.

Devil portrait. This image is from Saving the Devil.

New York, N.Y.- Mayim Bialik during her interview with Neil deGrasse Tyson. This image is from StarTalk.

Barneo Ice Camp, 89 degrees North: Jade Hameister, followed by her father Paul, and then Eric Philips pulling sleds. This image is from On Thin Ice: Jade's Polar Dream.

CGI: An Artist's rendering of Spirit climbing the Columbia Hills. This image is from Mars.

Reenactment: Commander Donald Macintyre and crew on deck of HMS Walker (Dramatic Recreation) Al Mctiernan. This image is from WW2 Hell Under the Sea.

A comic play is staged by an army theatre troupe. This image is from Nazi World War Weird.

New York, N.Y.- Comedian co-host Chris Hardwick and guest Summer Ash on set in the American Museum of Natural History. This image is from StarTalk.

South Africa: An adult Lion's roar can be heard up to 5 miles (8 kilometres) away. This image is from Animal Fight Club.

Reenactment: Commander Samuel Dealey and crew on bridge deck of USS Harder (Dramatic Recreation) Christian Raddell. This image is from WW2 Hell Under the Sea.

Arctic trek to North Pole: (Left to Right) Paul Hameister and Jade Hameister. This image is from On Thin Ice: Jade's Polar Dream.

Humpback whale jumping out of the water. This image is from River in the Sky.

Externsteine, Germany: Robert Joe explores Externsteine looking for reasons why Himmler was convinced that it played a significant role as a site of Germanic worship. This image is from Nazi World War Weird.

Loongana, Tasmania: Devil eating. This image is from Saving the Devil.

Reenactment: The crew on Mars. This image is from Mars.

A homing pigeon with its handler. This image is from Apocalypse WWI: Verdun.

Jaguar drinking at the waterfront. This image is from River in the Sky.

Wewelsburg, Germany: Wewelsburg Castle, which is located in the district of Paderborn and stands high on a rock overlooking the Alme Valley. This image is from Nazi World War Weird.

When they are successful on a hunt, wolves do not eat in moderation. A single animal can consume 20 pounds (9 kilograms) of meat in one sitting. This image is from Animal Fight Club.

The Kronprinz (crown prince) Wilhelm of Prussia, with the skull and crossbones, the emblem of the Hussars, on his headdress. This image is from Apocalypse WWI: Verdun.

Iguazu Falls with rainbow in the mist. This image is from River in the Sky.

Reenactment: The crew on Mars. This image is from Mars.

Napoleon, an artillery regiment's mascot strikes a pose, donning a cap and a pipe. This image is from Apocalypse WWI: Verdun.

Two black grizzly bears while fighting. This image is from Animal Fight Club.

Iguazu Falls. This image is from River in the Sky.

Rakhine State, Myanmar: Sam and Robert Joe are on a hunt for crocodiles on Ramree Island, the site of the world's worst crocodile disaster listed in the Guinness Book. This image is from Nazi World War Weird.

NEW YORK, N.Y.- Neil deGrasse Tyson and Buzz Aldrin in Neil's office at the American Museum of Natural History. This image is from StarTalk.

Blue wildebeest dual in dust. This image is from Animal Fight Club.