South Korean college students wearing masks hold up candles as they march after a rally calling for South Korean President Park Geun-hye to step down in Seoul, South Korea, Saturday, November 12, 2016. Hundreds of thousands of people flooded Seoul's streets on Saturday demanding the resignation of Park amid an explosive political scandal, in what may be South Korea's largest protest since it shook off dictatorship three decades ago. (Photo by Lee Jin-man/AP Photo)

Argentine-Spanish model Georgina Rodriguez attends the Kering Foundation's Caring for Women dinner during the Spring-Summer 2026 New York Fashion Week in New York City, U.S., September 11, 2025. (Photo by Angelina Katsanis/Reuters)

Local residents receive food from federal authorities in Xalacahuantla, Mexico, on Thursday, October 16, 2025. Hundreds of communities in central and eastern Mexico were cut off by deadly landslides and flooding caused by torrential rains. (Photo by Alfredo Estrella/AFP Photo)

U.S. President Donald Trump gestures during his visit to a section of the U.S.-Mexico border wall in Otay Mesa, California, U.S. September 18, 2019. Trump threatened to do “dastardly things” to Iran in response to the drone attacks on the world’s largest oil plant in Saudi Arabia. The US President indicated he is wary of involving America in another war in the Middle East – but he did not rule out a military attack. (Photo by Tom Brenner/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)

Russian cosmonaut Alexander Skvortsov, Expedition 40 flight engineer, attired in a Russian Orlan spacesuit, participates in a session of extravehicular activity (EVA) in support of science and maintenance on the International Space Station on August 18, 2014. During the five-hour, 11-minute spacewalk, Skvortsov and cosmonaut Oleg Artemyev (out of frame) deployed a small science satellite, retrieved and installed experiment packages and inspected components on the exterior of the orbital laboratory. (Photo by NASA)

American singer-songwriter Miley Cyrus makes a tank top referencing Selena Gomez's “SNL” joke in the second decade of May 2022. (Photo by mileycyrus/Instagram)

A young Iraqi shepherdess cools down buffaloes in wastewater filling the dried-up Diyala river which was a tributary of the Tigris, in the Al-Fadiliyah district east of Baghdad, on June 26, 2022. Iraq's drought reflects a decline in the level of waterways due to the lack of rain and lower flows from upstream neighboring countries Iran and Turkey. (Photo by Ahmad Al-Rubaye/AFP Photo)