Soldiers take a selfie on the plateform at a metro station in Ho Chi Minh City on December 22, 2024. Thousands of selfie-taking Ho Chi Minh City residents crammed into train carriages on December 22, as the traffic-clogged business hub celebrated the opening of its first-ever metro line after years of delays. (Photo by Nhac Nguyen/AFP Photo)

An instructor dances as participants follow the dance steps in a Bihu dance workshop ahead of the Rongali Bihu Festival in Guwahati, India, on April 8, 2025. (Photo by David Talukdar/NurPhoto/Rex Features/Shutterstock)

Women breastfeed their babies at an event promoting the freedom of mothers to breastfeed in public, during World Breastfeeding Week, at the Village Museum in Bucharest Romania, Saturday, August 6, 2016. (Photo by Andreea Alexandru/AP Photo)

Robot inventor Wu Yulu sits on a rickshaw driven by a robot which he invented in his village in rural Beijing's Tongzhou district, China, 17 November 2016. The 54-year-old Chinese farmer living in rural Beijing's Tongzhou district invented 63 robots in the past 30 years. Wu, who only received primary school education, plans to give up the agricultural work for his robot products. He regularly participates in exhibitions, transfers patent rights and teaches at the university to earn money. (Photo by Wu Hong/EPA)

Folk artists perform fire dragon dances on a stage on March 11, 2023 in Nanning, Guangxi Zhuang Autonomous Region of China. (Photo by VCG/VCG via Getty Images)

In this November 28, 1966 file photo, one of the 10 beagles involved in the first test of the Veterans Administration Hospital in East Orange, N.J. smokes a cigarette through a machine linked to its windpipe by a plastic tube to test any link between smoking and emphysema. (Photo by AP Photo)

This artist has put together an amazing picture set of a man blending into the Seven Wonders of the World with her incredible body art. New York artist Trina Merry is known for her unique style that blends body art with photography but in her Lost in Wonder series shes painted a models body to blend into some of the worlds most iconic locations. She had her subject, UK model Kyle James, pose fully painted in front of the Great Pyramid of Giza, the Great Wall of China, Petra, The Colosseum, Machu Picchu, Stone Henge and Easter Island. Here: Colusseum. (Photo by Trina Merry/Caters News)

Soap Bubble Structures by Kym Cox. Bubbles optimise space and minimise their surface area for a given volume of air. This phenomenon makes them a useful tool in many areas of research, in particular, materials science and “packing” – how things fit together. Bubble walls drain under gravity, thin at the top, thick at the bottom, which interferes with travelling lightwaves to create bands of colour. Black spots show the wall is too thin for interference colours, indicating the bubble is about to burst. (Photo by Kym Cox/2019 Science Photographer of the Year/RPS)