Revelers play in tomato pulp during the annual “La Tomatina” food fight festival in Bunol, Spain on August 30, 2023. (Photo by Eva Manez/Reuters)

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)

Glamorous strongwoman Joan Rhodes exercises her strength whilst tackling housework in her flat in Hampstead, north London, March 1958. (Photo by Ken Harding/BIPs). P.S. All pictures are presented in high resolution.

American model and television personality Chrissy Teigen lights up the Empire State Building with her style and smile in the last decade of May 2024. (Photo by chrissy teigen/Instagram)

Gemma Collins in the last decade of October 2024 sent temperatures soaring with a sеxy look. The iconic reality star channelled her inner Playboy bunny as she posed in her kitchen, wearing a black lace leotard and corset with fishnet stockings, a bowtie, cuffs and high heels. (Photo by Instagram)

Bob Steele, of Jefferson, Texas, positions his bears during The Great Bear Show at the Dubuque (Iowa) County Fair on July 25, 2012. (Photo by Jessica Reilly/Telegraph Herald)

A polar bear fast asleep at London Zoo. (Photo by Fox Photos/Getty Images). 1961

An exhibitor takes a photo with a Huawei Mate 10 Pro during the 2018 CES in Las Vegas, Nevada, U.S. January 9, 2018. CES, the world's largest annual consumer technology trade show, runs through January 12 and features about 3,900 exhibitors showing off their latest products and services to more than 170,000 attendees. (Photo by Steve Marcus/Reuters)