A goat climbs on Kylie Kennedy during a yoga class with eight students and five goats at Jenness Farm in Nottingham, New Hampshire, U.S., May 18, 2017. Picture taken May 18, 2017. REUTERS/Brian Snyder

Buffalo carry bears on their backs as they perform during the presentation of the new show "Unprecedentedness" at the Belarus State Circus in Minsk, Belarus May 25, 2017. REUTERS/Vasily Fedosenko

An artist performs during the Night in the Museum, cultural event dedicated to the International Museum Day, at the Museum of Arts in Almaty, Kazakhstan May 18, 2017. REUTERS/Shamil Zhumatov

A visitor to a preview of Taronga Zoo's illuminated endangered animal sculptures sits atop the Silverback Gorillas display, which is part of the Vivid Sydney festival of light and sound which will begin on May 26 with many of Sydney's landmarks participating in the annual event, in Sydney, Australia May 21, 2017. REUTERS/David Gray

Clowns participate in a parade during Clown Day celebrations in Lima, Peru May 25, 2017. REUTERS/Guadalupe Pardo

People take part in a pillow fight during a flash mob in Kiev, Ukraine, May 20, 2017. REUTERS/Valentyn Ogirenko

A protester stands wears a horse mask over a tear gas mask during clashes with riot security forces while rallying against President Nicolas Maduro in Caracas, Venezuela, May 18, 2017. REUTERS/Carlos Barria

A man has his photo taken hanging from a bull sculpture outside Las Ventas bullring during San Isidro's bullfighting fair in Madrid, Spain, May 23, 2017. REUTERS/Susana Vera

A girl's face is covered by a white powder after blowing on it, while participating in a game during a religious festival honouring patron saint Santa Rita de Cascia in Paranaque city, metro Manila, Philippines May 21, 2017. REUTERS/Romeo Ranoco

70th Cannes Film Festival - Screening of the film "Rodin" in competition - Red Carpet Arrivals - Cannes, France. 24/05/2017. Cast member and crew of the film "Zombillenium" arrive. REUTERS/Eric Gaillard

Girl jumps over a hobby horsing fence during a Finland 100 equestrian event in Helsinki, Finland May 20, 2017. Markku Ulander/Lehtikuva/via REUTERS

Passengers react inside a plant-filled bus, a special route that runs for 5 days, featuring the concept of integrating more green space into cities, in Taipei , Taiwan May 24, 2017. REUTERS/Tyrone Siu