A line of soldiers firing handguns during a training session, circa 1920. (Photo by Keystone). P.S. All pictures are presented in high resolution.

Anfisa, a twelve-year-old female chimpanzee, picks its nose at the Royev Ruchey Zoo in a suburb of the Siberian city of Krasnoyarsk, Russia on October 18, 2017. (Photo by Ilya Naymushin/Reuters)

Martin Herrera, 58, who has had a love for roosters since his childhood, and has spent the last 20 years domesticating and training them, walks with his favorite rooster “Paquito” in San Jose, Costa Rica April 27, 2017. (Photo by Juan Carlos Ulate/Reuters)

Triplet sisters Natalia, Irina and Tatiana Mironenko attend a rehearsal while preparing for examination performances staged by the graduates of the folk dance faculty of the Krasnoyarsk choreographic college in Krasnoyarsk, Russia May 13, 2019. All three 19-year-old sisters are expected to join the renowned Krasnoyarsk state academic dance ensemble of Siberia after the graduation. (Photo by Ilya Naymushin/Reuters)

A performer competes during the “Battle of the Legends” vogueing competition outside the Met (Metropolitan Museum of Art) on June 11, 2019 in New York City. In celebration of Pride month in New York the Museum hosted a vogueing competition, a highly stylized modern house dance. (Photo by Johannes Eisele/AFP Photo)

A praying mantis, a huddle of butterflies, Galician horses and an alpine sunset are the winners of this year’s European Environment Agency’s “Rediscover Nature” photo competition. Here: Nature on My Doorstep, finalist. I Want That Pomerade Grain by Biagio Alberto Scalia, taken in national park of Circeo, Latina, Italy. (Photo by Biagio Alberto Scalia/REDISCOVER Nature/EEA)

An Exmoor wild goat silhouetted in the sky over the Bristol Channel at the valley of the Rocks, North Devon, as the UK's heat wave continues on July 19, 2018. (Photo by Paul Silver/South West News Service)

Lion dance with LED lights, perform on the glass deck of the King Power Mahanakhon building, currently Thailand's tallest at 314 meters (1,030 feet) tall, Bangkok, Thailand, Monday, February 4, 2019. Chinese will celebrate the lunar new year on Feb. 5 this year which marks the Year of the Pig in the Chinese zodiac. (Photo by Sakchai Lalit/AP Photo)