An Afghan woman carries bread on a tray, along a street in Kabul on January 3, 2023. (Photo by Wakil Kohsar/AFP Photo)

School children wear face masks as they take part in an awareness rally against the use of tobacco on “World No Tobacco Day” in Kolkata on May 31, 2022. (Photo by Dibyangshu Sarkar/AFP Photo)

Pausing for a selfie as plum blossoms burst into bloom in Dujiangyan City, in southwest China’s Sichuan province on February 20, 2024. (Photo by Splash News and Pictures)

Pro-Palestian protesters yell at Orlando Police Department officers after they took two protesters into custody and deployed a noxious gas into the crowd during a rally in Orlando, Fla., Saturday, May 11, 2024. (Photo by Willie J. Allen Jr./Orlando Sentinel via AP Photo)

Personnel from Maharashtra Home Guards, a volunteer force practice yoga near the Gateway of India monument as they mark International Yoga Day in Mumbai, India, Friday, June 21, 2024. (Photo by Rajanish Kakade/AP Photo)

Medical staff administering the dose of Moderna COVID-19 Vaccine at the M A G Osmani Medical College & Hospital vaccination center in Sylhet, Bangladesh on July 26, 2021. (Photo by Md Rafayat Haque Khan/ZUMA Press Wire/Rex Features/Shutterstock)

People wearing face masks to help curb the spread of the coronavirus wait to walk across a traffic intersection in Osaka, western Japan, Thursday, November 26, 2020. (Photo by Hiro Komae/AP Photo)

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)