In this January 29, 2017 photo, musicians perform for dancers on the shores of Lake Titicaca, as they practice before their presentation for the Virgin of Candelaria celebrations in Puno, Peru. Dancers in colorful masks and elaborate costume celebrate the Virgin of Candelaria, patron saint of communities along the shore of Lake Titicaca, in what's considered the largest Catholic festival in the Andes. (Photo by Rodrigo Abd/AP Photo)

A Colombian soldier hugs his girlfriend during the graduation ceremony of soldiers in Nilo, Colombia, February 17, 2017. The soldiers will be deployed to occupy territories formerly controlled by FARC rebels. (Photo by Jaime Saldarriaga/Reuters)

Happiness on a Rainy Day by Fardin Oyan, Bangladesh. Winner of the young environmental photographer of the year. Many children in Bangladesh love to bathe and play in the rain. The country, which is flat and occupied by the huge Ganges-Brahmaputra Delta, is exposed to floods, especially during monsoon season. (Photo by Fardin Oyan/2018 Ciwem environmental photographer of the year 2018)

This picture taken on November 9, 2014 shows sharks for sale as a man removes the fins at a traditional market in Tanjung Luar in Lombok, West Nusa Teggara. Hundreds of sharks are hauled ashore every day at a busy market on the central Indonesian island of Lombok, the hub of a booming trade that provides a livelihood for local fishermen but is increasingly alarming environmentalists. The fins are sold to other Asian nations, including Singapore, Hong Kong and Taiwan, where shark-fin soup is considered a delicacy. (Photo by Sonny Tumbelaka/AFP Photo)

Two brown bear cubs born at Whipsnade Zoo. (Photo by Evening Standard/Getty Images). 1970

People look out at the city among 30,375 square feet of mirrors at SUMMIT One Vanderbilt in New York on May 22, 2024. The Parade of Ships is seen from SUMMIT One Vanderbilt in NYC as part of the Fleet Week Celebration events. (Photo by Timothy A. Clary/AFP Photo)

Japan's delegation gather to sign the formal surrender document on the U.S. Navy battleship USS Missouri in Tokyo Bay in a September 2, 1945 file photo. (Photo by Reuters/US Navy)

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)