Long-tailed mayflies (Palingenia longicauda) at Tisza river near Tiszainoka 135km (84 miles) southeast of Budapest, June 23, 2013. Millions of these short-lived mayflies engage in a frantic rush to mate and reproduce before they perish in just a few hours during “Tiszaviragzas” or Tisza blooming season from late spring to early summer every year. (Photo by Laszlo Balogh/Reuters)

A woman walks up a stairway painted in the rainbow colors in Bucharest, Romania, Saturday, July 11, 2020. Romania reported 698 new COVID-19 infections in the last 24 hours, the highest level since the pandemic reached the country in February. (Photo by Vadim Ghirda/AP Photo)

A woman walks past a graffiti mural, showing a child protecting with a Ukrainian flag against the war, made by artist ChemiS, on March 19, 2022 in Prague. (Photo by Michal Cizek/AFP Photo)

The Pumawari Tusuy group performs for the crowd gathered in the park at the first Annual Indigenous Peoples' Day Ceremonial Celebration in Newton, Massachusetts on October 11, 2021. October 11 is a federal holiday to mark Columbus Day, but the day was also officially recognized as Indigenous Peoples' Day following a proclamation by US President Joe Biden. (Photo by Joseph Prezioso/AFP Photo)

Afghan men work in a small sweets factory in Kabul, Afghanistan January 5, 2017. (Photo by Mohammad Ismail/Reuters)

People walk as snow falls in a main street in Jerusalem, 17 February 2021. Israeli Forecasters and the Meteorological Service ex​pect snow fall in Jerusalem. (Photo by Abir Sultan/EPA/EFE)

Participants costumed as zombies try to catch hobby runners during the so-called Zombie-Run at the harness racing track Karlshorst in Berlin, Germany, 18 May 2014. The runners carry small flags in their belts which they have to get safely across the finishing line while the zombies try to steal them. The sporting event is based on the US television series “The Walking Dead”. (Photo by Soeren Stache/DPA)

A young man wears a mask on the right side of his head as he stands on a bridge with the European Central Bank at left in Frankfurt, Germany, Thursday, October 29, 2020. (Photo by Michael Probst/AP Photo)