Zoo staff Sholpan Abdibekova and Tomiris, a five-year-old chimpanzee, watch a BBC environmental programme in a primate winter enclosure in Almaty, Kazakhstan. Reuters Archive. Photo by Shamil Zhumatov

Odka performs in during a media preview of Zippos Cirque Berserk at the Peacock Theatre in London, England. Reuters Archive.

Photo by Stefan Wermuth

Performers from Organizacion Efimera of Spain take part in the contemporary circus production «Fecha de Caducidad» (Date of Expiry) during the Malta Arts Festival in Valletta, Malta. Reuters Archive.

Photo by Darrin Zammit Lupi

The Navas Brothers perform during the official Award Gala Evening of the 37th International Circus Festival of Monte Carlo in Monaco. Reuters Archive.

Photo by POOL New

An artist performs during the annual «Kiev fire fest» in Kiev, Ukraine. Reuters Archive.

Photo by Gleb Garanich

Javier performs at the family-owned circus Clavito in Managua, Nicaragua. Reuters Archive.

Photo by Oswaldo Rivas

A circus performer practises during a training session in Havana, Cuba. Reuters Archive.

Photo by Alexandre Meneghini

Samuel Amador, 8, practises during a training session at a circus school in Havana, Cuba. Reuters Archive.

Photo by Alexandre Meneghini

Acrobats perform during an event celebrating 50 years of the foundation of the Workers Circus Union in Peru, at La Tarumba circus tent, in Lima, Peru. Reuters Archive.

Photo by Mariana Bazo

An artist performs a fire stunt during a special preview as part of Christmas celebrations at the Ajanta circus in Kolkata, India. Reuters Archive.

Photo by Rupak De Chowdhuri

Girls, who are part of Afghan Mobile Mini Circus for Children (MMCC), participate in a juggling competition in Kabul, Afghanistan. Reuters Archive.

Photo by Ahmad Masood

People gather around a member of an Egyptian circus team during the Sanaa Summer Festival in Sanaa, Yemen. Reuters Archive.

Photo by Khaled Abdullah Ali Al Mahdi

Karin Albert fixes the hair of her daughter Lily Romanelli, 3, before posing her in an elephant-themed photo booth at Ringling Bros and Barnum & Bailey Circus’ «Circus Extreme» show at the Mohegan Sun Arena at Casey Plaza in Wilkes-Barre, Pennsylvania, USA. Reuters Archive.

Photo by Andrew Kelly

Pilot and jet-ski champion Franky Zapata hovers in the air on an IPU Flyboard Air hoverboard as he breaks the Guiness World Records for furthest flight by hoverboard, after covering a distance of 2,252.4 meters (7,389.76 ft) with an average speed of 50-60km/h, in Sausset les Pins near Marseille, France. Reuters Archive.

Photo by Jean-Paul Pelissier

Zoltan Veres of Hungary performs during an air show in Budapest, Hungary. Reuters Archive.

Photo by Laszlo Balogh

An arctic tern swoops down from the sky above the Farne Islands off the Northumberland coast, northern England. Reuters Archive.

Photo by Nigel Roddis

A wildlife ranger strokes a northern white rhino, only three of its kind left in the world, ahead of the Giants Club Summit of African leaders and others on tackling poaching of elephants and rhinos, Ol Pejeta conservancy near the town of Nanyuki, Laikipia County, Kenya, April 28, 2016.

Photo by Siegfried Modola

A Bengal cat is seen during the Mediterranean Winner 2016 cat show in Rome, Italy, April 3, 2016.

Photo by Max Rossi