National Geographic has created “Air, Land & Sea: the 50 greatest wildlife photographs” exhibition. Here: Leopard seal, Anvers Island, Antarctica, 2006. (Photo by Paul Nicklen/National Geographic)





Albatross colony, Steeple Jason Island, Falkland Islands, 2015. (Photo by Paul Nicklen/National Geographic)





Orphan elephants mudding in a man-made waterhole in the Voi elephant stockade in Tsavo East national park, Kenya, 2010. (Photo by Michael Nichols/National Geographic)





Spinner dolphins, Oahu, Hawaii, 2013. (Photo by Brian Skerry/National Geographic)





Orangutan, Gunung Palung national park, Borneo, Indonesia, 2015. (Photo by Tim Laman/National Geographic)





Cassowary, north-east Queensland, Australia, 2012. (Photo by Christian Ziegler/National Geographic)





Sea lions playing, Hopkins Island, Australia, 1984. (Photo by David Doubilet/National Geographic)





Panda, Wolong nature reserve, Sichuan province, China, 2015. (Photo by Ami Vitale/National Geographic)





Gray whale,San Ignacio lagoon, Mexico, 2015. (Photo by Thomas P. Peschak/National Geographic)





Lighting, Wood River, Nebraska, 2016. (Photo by Randy Olson/National Geographic)





Forest kermode bear, Gribbell Island, Canada, 2010. (Photo by Paul Nicklen/National Geographic)





CT4 Crocodile cave on the Salamat river. Set up with Nathan Williamson last chip rain came while we were with the nomads. (Photo by Michael Nichols/National Geographic)





A giraffe walking in a misty forest in the Ndumu Game Reserve. (Photo by Chris Johns/National Geographic)





Vumbi (dust) pride 5 adult females and 9 cubs born in April 2011. Plains pride of the Serengeti Lion research project. Social licking before full moon night , low success in hunting. (Photo by Michael Nichols/National Geographic)