Soldiers on exercise in Kenya. The image, by Sergeant Dek Traylor, is among the section winners in the UK Army Photographic Competition 2018. (Photo by Sergeant Dek Traylor/PA Wire Press Association)

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)

Beda Haemmerli drives his 1936 Ford Indy race car (front) through a steep turn during the Indianapolis in Oerlikon race demonstration at the Offene Rennbahn cycling track in Zurich's Oerlikon suburb, Switzerland July 24, 2018. (Photo by Arnd Wiegmann/Reuters)

People walk behind the Medusa head in the Basilica Cistern in Istanbul, Turkey, 24 July 2022. The site has been restored by the Istanbul Metropolitan Municipality and is now open for visitors again. The Byzantine structure was commissioned by Emperor Justinian and built in 532. The underground Basilica, also called Underground Cistern, is the largest well preserved cistern in Istanbul, which rests on a total of 336 columns. According to historical texts, more than 7,000 slaves were involved in the construction of the cistern. (Photo by Sedat Suna/EPA/EFE)

An armed tribesman loyal to Houthis steps on a US flag during an anti-USA and anti-Israel rally, in Sana'a, Yemen, 29 January 2024. (Photo by Yahya Arhab/EPA/EFE)

The Fuel Girls with their fire and pyro performance on stage in London on September 20, 2025. The Big London Tattoo Show, the UK's largest tattoo convention, is in full swing at ExCeL London, transforming the venue into a bold celebration of tattoo artistry and alternative culture. (Phoot by Imageplotter/Alamy Live News)

Members of p*ssy Riot perform in concert during Day For Night festival on December 16, 2017 in Houston, Texas. (Photo by Gary Miller/Getty Images)

A Nihang Sikh, belonging to the Sikh warrior clan, performs Gatka, a form of Sikh martial arts, during a religious procession marking the 350th martyrdom anniversary of Guru Tegh Bahadur Ji in New Delhi, India, 25 November 2025. The procession commemorates the martyrdom of the 9th Sikh Guru, Sri Guru Tegh Bahadur Ji, who was executed in 1675 AD for refusing to convert to Islam on the orders of Mughal Emperor Aurangzeb. The event is observed at Gurudwara Sis Ganj in Delhi. Guru Tegh Bahadur, the youngest of the five sons of Guru Hargobind, was born in Amritsar in 1621. (Photo by Rajat Gupta/EPA)