Brain-on-a-chip. Dazzling in green and magenta this image shows the nerve fibres (in green) produced by neural stem cells (in magenta) as they grow on a synthetic gel. Captured by a technique known as confocal microscopy, the image is part of research shedding light on how tinkering with the environment can affect the way in which nerve fibres grow. (Photo by Collin Edington and Iris Lee/Massachusetts Institute of Technology/Wellcome Images)

Boys in ceremonial uniform at the civil wedding ceremony of American actress Grace Kelly and Rainier III, Prince of Monaco at the Prince's Palace of Monaco, 18th April 1956. Original publication: Picture Post - 8336 - The Hour Of Marriage - pub. 28th April 1956.

An operator adjusts a film projector during a wedding party in Bogor, Indonesia, February 18, 2017. Indonesian entrepreneur Kamaluddin loves the gritty look of old 35-millimeter film so much that he spends most of his nights screening vintage movies at weddings and parties around Jakarta, the capital. (Photo by Reuters/Beawiharta)

A model has her hair sprayed backstage at the Ukrainian Fashion Week in Kyiv, Ukraine on August 31, 2020. (Photo by Gleb Garanich/Reuters)

A model presents a creation from the Tom Ford Spring/Summer 2023 collection during New York Fashion Week in Manhattan, New York City, U.S., September 14, 2022. (Photo by Andrew Kelly/Reuters)

Sabine Marcelis stands beside her project “RA” during The Edition III at Pyramids of Giza, in front of the Great Pyramids of Giza, on the outskirts of Cairo, Egypt on October 26, 2023. (Photo by Mohamed Abd El Ghany/Reuters)

A medical staff member rests next to a patient infected with Covid-19 in the intensive care unit of Lozenets Hospitalin Sofia on November 9, 2021. Bulgaria is among the countries with the highest number of deaths compared to its population. (Photo by Nikolay Doychinov/AFP Photo)

A woman poses for a souvenir photo with a cat statue on display at the Shenzhen Bay commercial district, in Shenzhen, China's Guangdong province, Monday, September 15, 2025. (Photo by Andy Wong/AP Photo)