A combination photo shows various popular street foods under $6 from various hawker food stalls and eateries in Singapore, taken between July 28 to 31, 2016. Top row (L to R) bak chor mee, soya sauce chicken; Middle row (L to R) laksa, hokkien mee, nasi lemak, ice kachang; Bottom row (L to R) rojak, roti prata and satay. (Photo by Edgar Su/Reuters)

A child plays with a soap bubble on the city hall plaza on March 14, 2015 in Paris. (Photo by Dominique Faget/AFP Photo)

Students from St Andrews University indulge in a tradition of covering themselves with foam to honour the “academic family” on the lower college lawn on October 23, 2017, in St Andrews, Scotland. (Photo by Jeff J. Mitchell/Getty Images)

A Grevy’s zebra gets itself noticed at ZSL Whipsnade Zoo in Whipsnade, England on April 20, 2018. (Photo by Tony Margiocchi/Barcroft Media)

In this Sunday, August 5, 2018 photo, a dancer winces in pain as she is whipped by a fellow dancer in an adaptation of the Inca warrior dance known as “Kachampa”, during celebrations honoring Our Lady of Copacabana, in Cuzco, Peru. (Photo by Martin Mejia/AP Photo)

Traditional dancers are seen at Ela Beach, near a venue of the Asia-Pacific Economic Cooperation (APEC) summit in Port Moresby, Papua New Guinea, 13 November 2018. The APEC summit brings together world leaders from its 21 member nations and is being hosted for the first time by Papua New Guinea. (Photo by Mast Irham/EPA/EFE)

An American soldier walks ahead of an MKIV (Mark IV) British-made tank, circa 1918. (Photo by Hulton Archive/Getty Images)

Dancers from the Tareikura Academy dance on stage during The Power Of Inclusion Summit 2019 at Aotea Centre on October 03, 2019 in Auckland, New Zealand. The Power of Inclusion is a global summit where international and local voices share their stories, experiences and expertise to generate momentum for a future where representation and inclusion are the new screen industry standards. The Power of Inclusion summit is hosted by New Zealand Film Commission and Women in Film and Television International, with support from The Walt Disney Studios. (Photo by Michael Bradley/Getty Images for New Zealand Film Commission)