In this photograph taken on February 18, 2016, Pakistani children ride on swings in the predominantly Pashtun Korangi District of Karachi. In a rundown district of Karachi, Rabia balks at a neighbour's proposal to vaccinate her children, demonstrating one of the biggest hurdles to eradicating polio in Pakistan by the end of the year: confused and frightened parents. (Photo by Asif Hassan/AFP Photo)

The tail of a stranded whale is pictured on the beach of De Haan, Belgium on October 25, 2018. (Photo by Francois Lenoi/Reuters)

A humpead wrasse, transported from Japan's southern island of Okinawa, swims with other tropical saltwater fish on display in a tank for the Sony Aquarium 2017 exhibition in Tokyo on July 31, 2017. The Sony Aquarium 2017 exhibition, featuring marine life common to the waters around Okinawa, runs until August 13. (Photo by Kazuhiro Nogi/AFP Photo)

Performers of Everland Amusement Park present the part of Christmas Fantasy in downtown of Myundong in Seoul, South Korea on December 3, 2019. (Photo by Seokyong Lee/Penta Press/Rex Features/Shutterstock)

An Iraqi Kurdish Peshmerga female officer bites a Rabbit while demonstrating skills during a graduation ceremony in the Kurdish town of Soran, about 100 kilometres northeast of the capital of Iraq's autonomous Kurdish region Arbil, on February 12, 2020. (Photo by Safin Hamed/AFP Photo)

Students run out of their school celebrating their high school graduation at Nacka Gymnasium following the spread of the corona virus disease (COVID-19) in Stockholm, Sweden, June 3, 2020. (Photo by Jessica Gow/TT News Agency via 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)

The oldest car to wear the Porsche badge goes on view at Sotheby's on May 21, 2019 in London, England. The only surviving 1939 Porsche Type 64 Berlin-Rome, No. 3, this rare piece of motoring history was the personal car of Ferdinand and Ferry Porsche, predating the first production Porsche, the 356. The car is on view at Sotheby's in London from 21st -24th May prior to being offered for sale by RM Sotheby's in Monterey, California, 15-17th August 2019, with an estimate in excess of $20 million. (Photo by Tristan Fewings/Getty Images for Sotheby's)