Customers are seen in front of a shop that reopened in central Copenhagen, Denmark, 01 March 2021. Shops reopened after several months of closure due to the coronavirus COVID-19 pandemic. (Photo by Philip Davali/EPA/EFE)

Camila Iachini, 8, performs with her bike during celebrations for the 400th anniversary of the founding of the neighbourhood Petare, in Caracas, Venezuela on February 17, 2021. (Photo by Leonardo Fernandez Viloria/Reuters)

Grand champion Hakuho (front) barely defeats Daieisho on the first day of the Spring Grand Sumo Tournament at Tokyo's Ryogoku Kokugikan on March 14, 2021. (Photo by Kyodo News/Newscom/Profimedia)

A woman dressed in the style of a Hindu goddess keeps her face partially covered for a ritual during Maha Shivaratri celebrations on March 12, 2021 in Kaveripattinam, India. Maha Shivaratri is a major Hindu festival celebrated annually in honour of the god, Shiva. The festival is observed with chanting prayers, fasting, and meditating to overcome “darkness and ignorance” in life. (Photo by Abhishek Chinnappa/Getty Images)

In this Thursday, May 25, 2017 photo, Donte, a musician who only gave his first name, straightens out dollar bills on his first day in a brand new Chewbacca costume purchased from eBay for $441, in the Hollywood section of Los Angeles. Donte said he replaced the old one because he wasn't making any money with it. (Photo by Jae C. Hong/AP Photo)

Festival crowd enjoying the weather on Day 1 of Reading Festival on August 25, 2017 in Reading, England. (Photo by Dean Fardell/Barcroft Images)

Ismail Mustafa, seen in 2007. “I was collecting mushrooms on the hill near here. I didn’t see the mine. There was a huge explosion. When I woke up I saw that both my legs were gone; I thought my life was over. My brother and another guy were with me. They made a stretcher from sticks and tied it together with clothing. It took two hours to get off the mountain. ‘My daughter has also been injured. She found a shell and brought it into the house and put it on the fire. She didn’t know what she was doing at the time – she was only three. She is blind and has lost an arm”. (Photo by Sean Sutton for the Mines Advisory Group/The Guardian)

Behaviour: Mammals category. Giant Gathering by Tony Wu, USA. Dozens of sperm whales mingled noisily off Sri Lanka’s northeast coast, stacked as far down as Tony could see. This was a congregation of dozens of social units, like a gathering of the clans. Aggregations like this could be a critical part of the whales’ rich social lives but are rarely reported. Some two thirds of the population was wiped out before commercial whaling was banned in 1986. This kind of major gathering could be “a sign that populations are recovering”, says Tony. (Photo by Tony Wu/Wildlife Photographer of the Year 2017)