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)

“Family disagreement”. (Photo by Vlado Pirsa/Comedy Wildlife Photo Awards 2019)

Hidden Britain category winner. Garden Spider by Alan Smith from Reading, Berkshire. (Photo by Alan Smith/British Wildlife Photography Awards/PA Wire Press Association)

A competitor drives his homemade vehicle without an engine during the Red Bull Soapbox Race in Amman, Jordan on September 20, 2019. (Photo by Muhammad Hamed/Reuters)

A model presents a creation from the Chromat collection during New York Fashion Week in New York, U.S., February 8, 2019. (Photo by Caitlin Ochs/Reuters)

American rapper and songwriter Lil' Kim performs as she presents a creation from The Blonds Autumn/Winter 2019 collection during New York Fashion Week in New York, U.S. on February 12, 2019. (Photo by Andrew Kelly/Reuters)

Jared Leto, holding a model of his own head, attends The Metropolitan Museum of Art's Costume Institute benefit gala celebrating the opening of the “Camp: Notes on Fashion” exhibition on Monday, May 6, 2019, in New York. (Photo by Charles Sykes/Invision/AP Photo)

A dog dressed up for a show sits backstage during the 16th annual New York Pet Fashion Show on February 7, 2019 in New York City. (Photo by Johannes Eisele/AFP Photo)