This undated photo provided by NOAA in May 2018 shows aurora australis near the South Pole Atmospheric Research Observatory in Antarctica. When a hole in the ozone formed over Antarctica, countries around the world in 1987 agreed to phase out several types of ozone-depleting chemicals called chlorofluorocarbons (CFCs). Production was banned, emissions fell and the hole shriveled. But according to a study released on Wednesday, May 16, 2018, scientists say since 2013, there’s more of a banned CFC going into the atmosphere. (Photo by Patrick Cullis/NOAA via AP Photo)

Communist supporters hold portraits of Soviet leader Josef Stalin as they queue to lay flowers at the grave of Stalin to mark the 139th anniversary of his birth, in Moscow's Red Square, Russia, Friday, December 21, 2018. (Photo by Pavel Golovkin/AP Photo)

“Oak Sunrise” by professional photographer Alan Price has won the International Garden Photographer of the Year, “Celebrating Our Oaks” competition, run in partnership with Action Oak. Action Oak is a campaign to protect the UK’s oak trees from threats including pests and diseases. (Photo by Alan Price/IGOTY)

Drunk fresher is helped by students as she falls to the ground on night out at during the alcohol-fuelled Freshers’ Week in Birmingham, United Kingdom on September 18, 2017. Freshers are inducted during Freshers' Week – the first week of the Academic year – one of the busiest and most fun weeks of the year. (Photo by Caters News Agency)

Marta Garcia (R) of Spain loses the champgane bottle standing on the podium next to winner Jamie Chadwick of Great Britain after the first race of the W Series at Hockenheimring on May 04, 2019 in Hockenheim, Germany. W Series aims to give female drivers an opportunity in motorsport that hasn’t been available to them before. The first race of the series, which encompasses six rounds on the DTM support programme, is at the Hockenheimring on May 3rd and 4th. (Photo by Kai Pfaffenbach/Reuters)

Less than lady like behaviour on Ladies' Day at Epsom, England on June 2, 2017. Ladies' Day is traditionally held on the first Friday of June, a multitude of ladies and gents head to Epsom Downs Racecourse to experience a day full of high octane racing, music, glamour and fashion. (Photo by Peter Dench/Getty Images Reportage)

People take photos with the skyline of the central business district in Singapore on September 10, 2015. (Photo by Edgar Su/Reuters)

Secondary school graduates play in a fountain as they celebrate the last day of school, traditionally called the “last bell” in central Kiev, Ukraine on May 31, 2019. (Photo by Valentyn Ogirenko/Reuters)