Kendall Jenner (R) attends Casamigos Halloween party at CATCH Las Vegas at ARIA Resort & Casino on October 27, 2018 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images for Casamigos)

English fashion designer Mary Quant (R) with a group of models at Heathrow Airport, before leaving for a continental fashion tour, 18th March 1968. (Photo by Express/Getty Images)

Youths smeared in coloured powder and dressed as Lord Krishna (L) and deity Radha (R) celebrate with others the Holi festival, the Hindu spring festival of colours, in Kolkata on March 17, 2022. (Photo by Dibyangshu Sarkar/AFP Photo)

American supermodel Bella Hadid (R) holds onto her friend's leg for dear life in the second decade of January 2023. (Photo by bellahadid/Instagram)

Friends (L-R) Katherine Olson, Olivia Carroll and Maron Ross take a memory during the 148th running of the Preakness Stakes at Pimlico Race Course on May 20, 2023. (Photo by Jonathan Newton/The Washington Post)

Cadets prepare to take part in a full dress rehearsal for the upcoming Republic Day parade, in Chennai on January 24, 2024. (Photo by R. Satish Babu/AFP Photo)

With its huge eyes, comical name and diminutive size, Mark R. Smith’s image of a baby Hawaiian bobtail squid can’t help but raise a smile. A curiously endearing creature, the cephalopod is just 1.5cm across, its mantle cavity bearing more than a passing resemblance to a rather natty shower cap. But it is also a beautiful example of symbiosis – nature’s version of “I’ll scratch your back if you scratch mine” – for on the underside of the squid is a light organ which houses bioluminescent bacteria. The squid offers the bacteria protection and food, while the bacteria emit a glow – a handy trait that the squid uses to offset its silhouette, helping it to evade predators in the depths below. Mark R. Smith’s entry combines several images of a Hawaiian bobtail squid with different focus lengths to create a final picture with greater depth of field than normal. (Photo by Mark R. Smith/Wellcome Images/Macroscopic Solutions)

An injured boy who is undergoing surgery, after he was injured in what activists said was an airstrike by forces loyal to Syria's president Bashar al-Assad, rests inside a field hospital in the Douma neighborhood of Damascus, Syria December 5, 2015. Douma in Syria, an area controlled by rebels fighting to topple President Bashar al-Assad, has been shelled continuously for the past three years. The injured are taken to basements and shelters transformed into field hospitals run by medical staff who have stayed in the battered neighbourhood of Damascus. (Photo by Bassam Khabieh/Reuters)