Soap Bubble Structures by Kym Cox. Bubbles optimise space and minimise their surface area for a given volume of air. This phenomenon makes them a useful tool in many areas of research, in particular, materials science and “packing” – how things fit together. Bubble walls drain under gravity, thin at the top, thick at the bottom, which interferes with travelling lightwaves to create bands of colour. Black spots show the wall is too thin for interference colours, indicating the bubble is about to burst. (Photo by Kym Cox/2019 Science Photographer of the Year/RPS)

This 2014 series Shanghai Tian Wa saw Chinese photographer Liu Tao train his lens on two distinct districts in Shanghai. Here: “Shanghai Tian Wai №26, 2014”. (Photo by Liu Tao/The Guardian)

Jeremy Scott's spring 2019 collection is modeled during Fashion Week in New York, Thursday, September 6, 2018. (Photo by Kevin Hagen/AP Photo)

Sеxy woman in lace eye cover and red lips with young lover, foreplay in hotel room. (Photo by sakkmesterke/Getty Images)

A lightning strikes through smoke from fuel storage tanks that exploded near Cuba's supertanker port in Matanzas, Cuba on August 8, 2022. (Photo by Alexandre Meneghini/Reuters)

A tribal fighter loyal to Yemen's government stands in Al Khurais village of Nihm district east of the capital Sanaa January 11, 2016. (Photo by Ali Owidha/Reuters)

A model presents a creation by Singapore-born designer Andrew GN as part of his Fall/Winter 2016/2017 women's ready-to-wear collection show in Paris, France, March 4, 2016. (Photo by Benoit Tessier/Reuters)

Deal or New Deal, Season 2. Pictured: Meghan Markle, 2006. (Photo by Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)