The photographs feature fish that have been specially treated to make the stained skeletal tissues visible through the skin and flesh. The technique, developed by Dr. Adam Summers, uses dyes, hydrogen peroxide, a digestive enzyme and glycerin to make the flesh seem to disappear. Photo: This image of the butterfly ray (Gymnura crebripunctata) helped scientists study the joints in its wings. (Photo by Adam Summers)

Mohamed Gamal Abdel Nasser, a workshop owner, tests primus stoves known as “Bagour” in Arabic, in Cairo, Egypt, May 11, 2016. (Photo by Mohamed Abd El Ghany/Reuters)

Palestinian children practise parkour along a beach in Gaza City at sunset on January 27, 2021. (Photo by Mohammed Abed/AFP Photo)

A car drives through a flooded road following heavy rain in Gaza City on December 27, 2019. (Photo by Mohammed Abed/AFP Photo)

Locals light firecrackers on the occasion of Diwali, the Hindu festival of lights, in Chennai, India on November 12, 2023. (Photo by Idrees Mohammed/EPA/EFE)

A Palestinian man rides his horse on a beach in Gaza City February 17, 2017. (Photo by Mohammed Salem/Reuters)

A Palestinian youth sets a beach umbrella on the shore off of Gaza City, on January 12, 2022. (Photo by Mohammed Abed/AFP Photo)

A woman sandboards on the mountain in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. (Photo by Mohamed Abd El Ghany/Reuters)