People visit the art installation “Machine Memories: Space” by Turkish artist Refik Anadol in the exhibition at Pilevneli Art Gallery in I​stanbul, Turkey, 22 March 2021. The exhibition runs until 25 April. (Photo by Sedat Suna/EPA/EFE)

Members of the media document a damaged train carriage extracted from a tunnel after the deadly train derailment north of Hualien, Taiwan on April 6, 2021. (Photo by Ann Wang/Reuters)

Senegalese wrestlers cover themselves in sand as they prepare to start their training program in Petit Mbao on March 29, 2021. As Covid-19 restrictions have been lifted, wrestlers now start prepare themselves for the start of wrestling tournaments. Senegalese wrestling, which has its roots in the ceremonies celebrating the end of harvests in Serer and Diola ethnic groups and remains surrounded by a thick cloud of mystical practice, is still extremely popular in this West African country. (Photo by John Wessels/AFP Photo)

A woman wearing a protective face mask carries her pet cat in a backpack as they wait to cross a street, amid the coronavirus disease (COVID-19) outbreak in Barcelona, Spain on April 9, 2021. (Photo by Nacho Doce/Reuters)

A grey heron is seen at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. (Photo by Flavio Lo Scalzo/Reuters)

A woman argues with police officer during a protest in support of jailed opposition leader Alexei Navalny in Ulan-Ude, the regional capital of Buryatia, a region near the Russia-Mongolia border, Russia, Wednesday, April 21, 2021. Navalny's team has called for nationwide protests on Wednesday following reports that the politician's health was deteriorating in prison, where he has been on hunger strike since March 31. Russian authorities have stressed that the demonstrations were not authorized and warned against participating in them. (Photo by Anna Ogorodnik/AP Photo)

Volodymyr, a service member of the Ukrainian armed forces, plays with puppies at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine on April 10, 2021. The two unnamed puppies living on frontline positions will be taken home and named by soldiers departing on troops rotation. (Photo by Oleksandr Klymenko/Reuters)

The rusty emblem of the Soviet Union is seen over the ghost town of Pripyat close to the Chernobyl nuclear plant, Ukraine, Thursday, April 15, 2021. The vast and empty Chernobyl Exclusion Zone around the site of the world’s worst nuclear accident is a baleful monument to human mistakes. Yet 35 years after a power plant reactor exploded, Ukrainians also look to it for inspiration, solace and income. (Photo by Efrem Lukatsky/AP Photo)