Photo of the day

Sahara Desert: The rare Mali elephant undertakes the longest elephant migration on earth – a 300-mile circle around the heart of landlocked Mali in West Africa. Traversing the southern edge of the Sahara Desert, the only way to survive is to keep moving across the scorched earth – from water to water, food to food – both in desperately short supply. This image is from Move or Die.

Israel: Albert Lin atop Masada overlooking the Jordan Rift Valley. This image is from Buried Secrets of The Bible with Albert Lin.

Behind the scenes with Journalist , CNN National Security Analysis, Peter Bergen and Former Mujahideen, friend of Osama bin Laden, Abdullah Anas. This image is from Bin Laden's Hard Drive.

A polar bear cub cuddles its mother. In Wild_Life: The Big Freeze, filmmaker Bertie Gregory travels to the Canadian Arctic and braves freezing temperatures for rare encounters with polar bears, wolves, harp seals and other wildlife. This image is from Wild_Life: The Big Freeze.

Kayin the baby White Rhino getting friendly with a few of the animal care professionals. This image is from Secrets of the Zoo: Tampa.

Collection of broken figurines with their descriptions. More than 500 pieces have come from the Keros project excavations and a total of 900 pieces from Keros all together. This image is from Buried Secrets of Keros.

Cheetah chasing a warthog at top speed. This image is from World's Deadliest Lion.

Two seals face-to-face in the arctic snow. In Wild_Life: The Big Freeze, filmmaker Bertie Gregory travels to the Canadian Arctic and braves freezing temperatures for rare encounters with polar bears, wolves, harp seals and other wildlife. This image is from Wild_Life: The Big Freeze.

Sahara Desert: The rare Mali elephant undertakes the longest elephant migration on earth a 300-mile circle around the heart of landlocked Mali in West Africa. Traversing the southern edge of the Sahara Desert, the only way to survive is to keep moving across the scorched earth from water to water, food to food both in desperately short supply. This image is from Move or Die.

A wolf walks through the arctic snow. In Wild_Life: The Big Freeze, filmmaker Bertie Gregory travels to the Canadian Arctic and braves freezing temperatures for rare encounters with polar bears, wolves, harp seals and other wildlife. This image is from Wild_Life: The Big Freeze.

Loktak lake, a gem tucked away in the far northest of India. This image is from India from Above.

A fox pauses in the arctic. In Wild_Life: The Big Freeze, filmmaker Bertie Gregory travels to the Canadian Arctic and braves freezing temperatures for rare encounters with polar bears, wolves, harp seals and other wildlife. This image is from Wild_Life: The Big Freeze.

Dr. Konstantinos Paschalidis holding a female figurine. This image is from Buried Secrets of Keros.

USA, Alaska, Katmai National Park, Brown Bear catching Salmon in river, side view. This image is from World's Deadliest Lion.

A Puma hunting in the snowy Chilean mountains. This image is from Winters Hidden Wonders.

An excavated building at the top of Daskalio with Keros in the background. This image is from Buried Secrets of Keros.

Western Wyoming, Grand Teton National Park: In the untamed early days of the American West, pronghorn were plentiful, proud and moved freely. One small herd of around 200 follows its ancient migration. Driven by the seasons, their migration from the mountains to the valleys and back has always been a tough journey, but now fences, borders, bloated rivers and other constraints have created blockades and bottlenecks that result in devastating losses for this critically endangered species. This image is from Move or Die.

Osama bin Laden standing in front of camera during his speech. He messes up and smiles. This image is from Bin Laden's Hard Drive.

The SS Sapona is a shipwreck in the Bahamas that is also the last spot Flight 19 is known to have been before disappearing. This image is from Atlas of Cursed Places.

Keepers noticed that Ceduna the koala was becoming very protective of her pouch area which could indicate that she has a joey. This image is from Secrets of the Zoo: Tampa.

A moose seen from overhead as it walks through the snow. In Wild_Life: The Big Freeze, filmmaker Bertie Gregory travels to the Canadian Arctic and braves freezing temperatures for rare encounters with polar bears, wolves, harp seals and other wildlife. This image is from Wild_Life: The Big Freeze.

Bran Castle was the inspiration for Dracula. This image is from Atlas of Cursed Places.

The colonies of Eciton burchelli, an army ant, range in size from 300,000 to 700,000. Swarms of E. burchelli can reach 15 yards wide. The swarm raid allows the ants to capture a wide variety of prey by swarming around the prey and closing in on all sides, so that they cannot escape. This image is from Move or Die.

The double decker root bridges. This image is from India from Above.

Meerkat sentries stand guard over their home, prepared to take on any less-than-friendly neighbors. Sometimes they may run away, but on some occasions they will fight brutal battles. This image is from World's Deadliest Lion.

Geologist Eric Drummond and Host Sam Sheridan are analyzing an area on the coast that looks like it was enhanced by human activity, and could have housed Atlantis' fleet. This image is from Atlas of Cursed Places.

Keros Island, the site of the broken figurines. This image is from Buried Secrets of Keros.