A woman affected by tear gas is assisted during a May Day protest against austerity measures, in San Juan, Puerto Rico May 1, 2018. (Photo by Alvin Baez/Reuters)

A Fulani woman fixes her head scalf on the street of Dapchi, Yobe state, Nigeria on February 27, 2018. (Photo by Afolabi Sotunde/Reuters)

The Spanish photographer Xavi Bou digitally combines sequential pictures of birds to create a single image, or chronophotograph, that reveals the shapes of their flight paths against Catalonian skies. His work shows the variety and beauty to be found in the daily activities of the local birds, including spiralling storks, swooping starlings and giddy swifts. Here: European herring gulls at Llobregat Delta. (Photo by Xavi Bou/Rex Features/Shutterstock)

Members of the Communist New Fourth Army on parade. Note how the modern equipment contrasts with the shoeless soldiers in the foreground. (Photo by Hulton Archive/Getty Images). 6th July 1946

Photographer and animal lover Chris Keeney shows how to use a PetCam with your own pet and offers expert technical know-how and inspiring creative suggestions to get you started. This is Coulee, a border collie/golden retriver mix from Lethbridge, Alberta, Canada. (Photo by Chris Keeney/Princeton Architectural Press)

For many of us, simply bending over to touch our toes can be a difficult. But it's not a problem for the world's bendiest woman Julia Günthel aka Zlata (27). Russian-born Zlata can twist herself like a snake into the most extreme poses imaginable – and has broken numerous world records for her flexibility. The former gymnast, who is 5ft 8in, is so flexible she can cram herself into a 50cm squared box. Photo: Russian-born Zlata is pictured in Fifties style glam while still managing to bend herself in half. (Photo by Barcroft Media)

At first glance, you may think you’re just gazing upon serene sunsets, breathtaking landscapes and peaceful coves of distant lands. It’s not until you realise the settings are made entirely from food that you can feast your eyes over the magnificence of Carl Warner’s “foodscapes”. Photo: “Salami Tuscany”. (Photo by Carl Warner)

An octopus is filmed by the National Oceanic and Atmospheric Administration ship Okeanos Explorer and its robotic sub. (Photo by National Oceanic and Atmospheric Administration)