A reveller performs during the first night of carnival parade at the Sambadrome in Rio de Janeiro, Brazil on February 23, 2020. (Photo by Carl de Souza/AFP Photo)

A group of Japanese schoolgirls marching in formation during a school visit to the third regiment to experience the soldier's way of life. (Photo by Fox Photos/Getty Images). Circa 1938

A member of the Eton public school O.T.C. (Officers Training Corps) practising shouting out orders during a training session, 20th January 1940. (Photo by Hulton Archive/Getty Images)

A design of Hongik University Seoul is displayed on July 19, 2011 in Maranello, Italy. The Ferrari World Design Contest has been launched by Ferrari in collaboration with Autodesk for 50 prestigious international design schools. The winners will win an internship at Ferrari. (Photo by Vittorio Zunino Celotto/Getty Images)

Californian photographer and conservationist Octavio Aburto had spent years photographing the school in Cabo Pulmo National Park, Mexico – and had been trying to capture this exact shot for three years. “Together with my friend David Castro, we were diving with a large group of Bigeye travellies at Cabo Pulmo National Park, Mexico. Thousands of fish forming a ball during the reproduction courtship. In the afternoon, these fish congregate to form a large spawning aggregation around the reefs of the National Park”. (Photo and caption by Octavio Aburto)

Men stage an attack during a training session for the Olympic Torch Security Team who will be protecting the torch bearers and Olympic flame during the torch relay's progress through the UK, at the Metropolitan Police Training School on March 9, 2012 in London, England. (Photo by Lewis Whyld – WPA Pool /Getty Images)

Teachers and students of dance schools dance maintaining social distance in Barcelona, Spain on November 9, 2020 during a protest against harsher anti-covid19 measures as closures in the hospitality and culture sector and limitations of social contacts by the Catalan government due to the accelerated spread of the coronavirus. (Photo by Matthias Oesterle/ZUMA Wire/Rex Features/Shutterstock)