Photo of the day

Musk oxen are well adapted to a life in the freezer. In small herds they brave the elements and low temperatures up to minus 40°C. This image is from Masters of the Wild.

Paul Sereno and Nizar Ibrahim hold alligator in their lab at the University of Chicago. This image is from Bigger Than T. rex.

Inca tern feeds on large schools of anchoveta. This image is from Wild 24.

Great Barrier Reef: Commercial dive instructor Paddy Colwell diving the steep walls of Osprey Reef, an extinct volcano with drop offs that plunge a thousand metres down. This image is from Life on the Barrier Reef.

Houston, Texas: Prof. Phillip Manning, paleontologist at the University of Manchester, stands in the jaws of a mighty Tyrannosaurus. This image is from Dino Death Match.

Giraffe's evolved long necks to access leaves in high branches on the savannah. This image is from Wild 24.

Great Barrier Reef: Commercial dive instructor Paddy Colwell inspecting the marine life on the Great Barrier Reef. This image is from Life on the Barrier Reef.

As soon as the little meerkats are old enough to come out of their den, the curiosity is bigger than their fear. Together they are exploring everything around them. Some are braver than others. This image is from Masters of the Wild.

Baltimore, MD: Stephen J. Godfrey Ph.D. Curator of Paleontology, Calvert Marine Museum. Stephen talks about the size, teeth and jaw of a megalodon. This image is from Top 10 Biggest Beasts Ever.

Andean flamingo -dances in shallow salt lakes to stir up brine-their distinctive red color comes from a beta-carotene pigment in the brine creatures. This image is from Wild 24.

Alice Roberts looks up at the largest spider in the dining room - the golden orb weaver. This image is from The Amazing Spider House.

Leopard seals are one of Antarctica's apex predators. This image is from Wild Antarctica.

Houston, Texas: Top predators in their day, the tyrannosaur specimens at Houston Museum of Natural Science look as terrifying as ever, some 66 million years later. This image is from T. rex: Ultimate Survivor.

Florida: Contributor Mike Barnette looking into cockpit of A3 Sky Warrior. This image is from Drain the Bermuda Triangle.

Two elephants standing and drinking from small water source. The water holes also give elephants access to important mineral sources buried deep below the surface. This image is from March of The Elephants.

Great Barrier Reef: Aerial, Lizard Island. This image is from Life on the Barrier Reef.

Hill City, S.D.: Pete Larson, paleontologist and president of the Black Hills Institute of Geological Research in South Dakota, stands amongst his fossil collection. Pete led the team that discovered and excavated "Sue", the largest and most complete Tyrannosaurus rex ever found. This image is from Dino Death Match.

Many rainforest plants contain toxins to deter browsers so forest elephants use the mud to neutralise the caustic compounds. This image is from Masters of the Wild.

Weddell seal pup born in early spring to make full use of the coming summer feeding frenzy. This image is from Wild Antarctica.

Bermuda: Contributor Dr. Philippe Rouja swimming off of the bow of the Mary Celestia. This image is from Drain the Bermuda Triangle.

Elephant calf in foreground with wet trunk. Adult elephants drinking water in background. The young calf tries to imitate the behaviour of the elders, even though he will be on a strict diet of his mother's milk for the first few years of his life. This image is from March of The Elephants.

Gentoo penguins flee the depths of Antarctica's weather by migrating north on expanding sea ice. This image is from Wild Antarctica.

United Kingdom: T. rex on display in the custom-designed biology lab prior to autopsy. This image is from T. rex Autopsy.

Great Barrier Reef: A green sea turtle climbs up the beach of Raine Island to lay her eggs. Raine Island is the largest Green Sea Turtle rookery in the world. This image is from Life on the Barrier Reef.

Two elephants standing and drinking from small water source. The water holes also give elephants access to important mineral sources buried deep below the surface. This image is from March of The Elephants.

Indianapolis, Ind.: The dinosaur exhibit at The Children's Museum of Indianapolis breathes new life into these 66 million year old tyrannosaur bones. This image is from T. rex: Ultimate Survivor.

Muskoxen moult their wool every year but the guard hairs keep growing and in adults can drag along the ground. This image is from Masters of the Wild.