A participant of the sled dogs race in action with the dogs in Stroehen (Lower Saxony), Germany, 18 October 2015. It is the first round of the North German Championship. (Photo by Peter Steffen/EPA)
Soldiers of the 70th division of the American 7th Army hold up a Nazi flag and a portrait of Adolf Hitler, taken during the World War II capture of Saarbrucken. (Photo by Horace Abrahams/Keystone/Getty Images). 22nd March 1945
A visitors to the National Galleries of Scotland view the work “A girl” of sculptor Ron Mueck on August 4, 2006 Edinburgh in Scotland. (Photo by Jeff J Mitchell/Getty Images)
A model is groomed backstage of the Fashion East catwalk show during London Fashion Week Spring/Summer 2017 in London, Britain September 17, 2016. (Photo by Neil Hall/Reuters)
Riot police stand guard behind a fire as refinery workers hold a blockade of the oil depot of Douchy-Les-Mines to protest against the government's proposed labour reforms, on May 25, 2016. Refinery workers stepped up strikes that threaten to paralyse France weeks ahead of the Euro 2016 tournament as the government moved to break their blockades, escalating a three-month tug-of-war over labour reforms. (Photo by François L.O./AFP Photo)
Shoppers walk past crocodiles for sale at a market in Bata on February 3, 2015. Markets in Equatorial Guinea sell a variety of animals including pangolins, monkeys and crocodiles as food. (Photo by Carl De Souza/AFP Photo)
British photographer Christopher Swann captures the fascinating underwater action that takes place when sharks and dolphins prey on a school of mackerel. We rarely think about how members of the animal kingdom hunt or defend themselves, but the wildlife photographer gives some perspective on these particular creatures off the coast of Azores.