South Korean teenagers participate in a warfare exercise as part of the Special Warfare Command's training course at a military base on August 4, 2011 in Seoul, South Korea. About 1,000 civilian volunteers including middle and high school students participated in the special force's four-day training programme to develop their spiritual and physical strength. (Photo by Chung Sung-Jun/Getty Images)

The first tram is delivered to the Gogar tram depot on October 17, 2011 in Edinburgh, Scotland. The tram was delivered on a low loader which had driven from Irun, northern Spain and is the first of 27 trams expected to arrive at the depot over the coming months. Last month the Scottish Government intervened to oversee the troubled Edinburgh trams project assigning project managers from Transport Scotland to work with contractors Bilfinger Berger. (Photo by Jeff J Mitchell/Getty Images)

Earlier this year, Belgian film-maker and artist Vincent Bal stumbled upon an uncanny resemblance to an elephant in the shadow of his tea cup. This gave him the idea for Shadowology, a series of doodles that interact with the shadows of simple, everyday objects: a banknote, some ice cubes and a flower, for example, can turn into a church, a woman and a hippy. “I draw a few lines and I get my image. It’s really the shadows that inspire me”, Bal says. Here: “Stonedog”. (Photo by Vincent Bal/The Guardian)

Jason Ramsay and Amy Laverty, from Arbroth, Scotland, pose beside a large Christmas tree at Bondi Beach on December 25, 2016 in Sydney, Australia. Bondi Beach is a popular tourist destination on Christmas Day. (Photo by Don Arnold/Getty Images)

A boy kicks a football in Dudley Page Reserve as storm clouds gather over the city skyline on September 30, 2021 in Sydney, Australia. The Bureau of Meteorology has issued severe storm warnings for the city. (Photo by Mark Evans/Getty Images)

An Indian Hindu devotee celebrates Holi, the spring festival of colours, during a traditional gathering at a temple in Nandgaon village in Uttar Pradesh state on March 16, 2019. Holi, the popular Hindu spring festival of colours is observed in India at the end of the winter season on the last full moon of the lunar month. (Photo by Noemi Cassanelli/AFP Photo)

Cardi B performs at the “Night Two At Palms Casino Resort's KAOS Dayclub & Nightclub With Cardi B, G-Eazy, J Balvin For Grand Opening Weekend” event on April 6, 2019 in Las Vegas, Nevada. (Photo by Roger Kisby/Getty Images for Palms Casino Resort)

(From L) Spanish actresses Aixa Villagran, Leticia Dolera and Celia Freijeiro pose on the pink carpet during the closing night of the 2019 Cannes International Series festival Canneseries, at the Palais des festival, in Cannes southern France, on April 10, 2019. (Photo by Valéry Hache/AFP Photo)