In this photo taken late Thursday, May 7, 2015, a prison guard, left, and seated inmates cast shadows on a wall while waiting for the beginning of a rock concert by Romanian band Pro Musica, inside the Popa Sapca jail in Timisoara, western Romania. (Photo by Adi Piclisan/AP Photo)

An actor holds a fake baby while waiting for the Wintershall Nativity play dress rehearsal to begin at Wintersall Estate on December 12, 2021 in Guildford, England. The Nativity play, which tells the story of the birth of Jesus Christ, has been performed annually since 1990 over the Christmas period by the Wintershall players. (Photo by Hollie Adams/Getty Images)

A blooming cherry tree is seen along the Tidal Basin on Sunday March 20, 2022 in Washington, DC. As Covid-19 precautions begin to lift around the country large crowds are able to once again descend upon the region for the blossoming cherry trees. (Photo by Matt McClain/The Washington Post)

Runners high-five children cheering from the sidewalk as they begin the half marathon during the Ottawa Race Weekend, which returned from a two-year hiatus due to the COVID-19 pandemic in Ottawa, Canada on Sunday, May 29, 2022. (Photo by Canadian Press/Rex Features/Shutterstock)

Indians in traditional attire pose for the media as they practice the Garba, a traditional dance of Gujarat state, ahead of Navratri festival in Ahmedabad, India, Monday, October 9, 2023. The Hindu festival of Navratri, or nine nights, will begin on October 15. (Photo by Ajit Solanki/AP Photo)

Nyibol Lual, 13 years old, helps her family to prepare the land for cultivation on May 31, 2017, in Panthau, Northern Bahr al Ghazal, South Sudan. The family has a small land where they cultivate sorghum. An estimated 63 per cent of the population in Northern Bahr al Ghazal is experiencing severe food insecurity, according to the latest Integrated Food Security Phase Classification (IPC) report. The situation is particularly bad in Aweil West and Aweil South counties, where the exhaustion of household food stocks and growing dependence on financially inaccessible markets have left the population facing Emergency levels of food insecurity. (Photo by Albert Gonzalez Farran/AFP Photo)

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)

A competitor prepares to snorkle during the World Bog Snorkelling Championships on August 28, 2011 in Llanwrtyd Wells, Wales. In 2012, following the Olympic Games, Llanwrtyd Wells will host the inaugural World Alternative Games. (Photo by Harry Engels/Getty Images)