Oil pools in a leaf on the beach following an oil slick at Tanjong Beach in Sentosa, Singapore on June 15, 2024. (Photo by Edgar Su/Reuters)

To the woman presented a flower in Sevastopol, Ukraine, on March 8, 2013. Activists presented this day on the street free 155 tulips to women. The police tried to arrest activists for illegal trade as couldn't believe in free distribution of flowers. (Photo by Sergey Anashkevitch)

Large trumpet vines spread across electrical lines next to a highway in Kinston, N.C., on June 23, 2014. (Photo by Janet S. Carter/Kinston Free Press via AP Photo)

China perform during the mixed team free preliminaries on day seven of the Doha 2024 World Aquatics Championships at Aspire Dome on February 8, 2024 in Doha, Qatar. (Photo by Clodagh Kilcoyne/Reuters)

A kingfisher plunged into the water in Trowbridge, Wiltshire, UK in the first decade of June 2025, to grab a fish for lunch – but its prey twisted free in a last-second escape. (Photo by Alan Benson/Caters News Agency)

Team China performs during the team free routine artistic swimming competition at the 19th Asian Games in Hangzhou, China, Sunday, October 8, 2023. (Photo by Aaron Favila/AP Photo)

Free runners “3run” take advantage of O2's empty Slough HQ on the company's flexible working day on February 8, 2012 in Slough, England. (Photo by Ian Gavan/Getty Images for O2)

Underwater photographer Sarah Lee uses a technique known as “duck diving” to capture these stunning photos of surfers in Hawaii. Surfers “duck dive” under the water to avoid incoming waves so they can get further out to sea. Photo: A surfer comes free from her surfboard. (Photo by Sarah Lee/Caters News)