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)

Actress Asia Argento attends the “Zulu” Premiere and Closing Ceremony during the 66th Annual Cannes Film Festival at the Palais des Festivals on May 26, 2013 in Cannes, France. (Photo by Vittorio Zunino Celotto)

Heidi Klum and Bar Rafaeli attend the amfAR New York Gala 2019 at Cipriani Wall Street on February 6, 2019 in New York City. (Photo by Dimitrios Kambouris/amfAR/Getty Images)

Zendaya arrives at the 25th Annual Critics' Choice Awards at Barker Hangar on January 12, 2020 in Santa Monica, California. (Photo by Danny Moloshok/Reuters)

Tamta of Cyprus arrives at the 64th Eurovision Song Contest held at Tel Aviv Fairgrounds on May 12, 2019 in Tel Aviv, Israel. (Photo by Amir Cohen/Reuters)

A migrant boy sits on railway tracks at a train station in Tovarnik, Croatia, September 20, 2015. (Photo by Antonio Bronic/Reuters)

Actors Alexandra Shipp and Vanessa Hudgens attend a premiere screening for “Tick, Tick . Boom” during the opening night of AFI Fest at TCL Chinese theatre in Los Angeles, California, U.S. November 10, 2021. (Photo by Mario Anzuoni/Reuters)

Florence Welch of Florence And The Machine performs at Spark Arena on January 30, 2019 in Auckland, New Zealand. (Photo by Dave Simpson/WireImage)