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)

A woman wears a flower crown during a Summer Solstice celebration on June 21, 2021 in Krakow, Poland. The summer solstice represents the longest day of the year, with the most hours of sunlight, and is celebrated by various cultures worldwide. (Photo by Omar Marques/Getty Images)

These are the stunning images of what looks like a picturesque winter wonderland – but actually shot in the middle of summer. Amateur photographer Catherine Perkinton, 45, has spent the summer travelling around the country to create the fabulous images by utilising infra-red. (Photo by Catherine Perkinton/SWNS/ABACAPress)

Christian families living in a refugee camp stand under a tree in Kaga-Bandoro, Central African Republic, Tuesday February 16, 2016. Refugees in the north of Central African Republic say they hope the new president will bring peace but no one is heading home just yet. Thousands are still living in displacement camps in Kaga-Bandoro, a stronghold of the former Muslim rebel group known as Seleka that was in power for nearly a year. The one-time rebels say they are waiting to see how the election turns out before taking any action. (Photo by Jerome Delay/AP Photo)

Irish television personality, presenter and model Maura Higgins in the first decade of October 2022 treated her followers to a first look of her new campaign with Ann Summers. They believe everyone has the right to wear whatever they want, however they want – your clothes should be about you and nobody else. Want campaign fronted by Maura now, with more styles landing throughout the month. (Photo by Ann Summers)

The mother of a protester mourns at a hospital after her son was killed was killed during clashes on March 03, 2021 in Yangon, Myanmar. Medics and health workers have found themselves on the front lines and under intense pressure, as they try to help anti-coup protesters as resistance continues to erupt across the country, to be met with deadly force by the military junta. (Photo by Stringer/Getty Images)

Soldiers from Japan's Ground Self Defense Force come ashore in amphibious assault vehicle as they train alongside U.S. Marines during the bilateral annual Iron Fist military training exercise in Camp Pendleton, California February 26, 2016. (Photo by Mike Blake/Reuters)

Leidi, a member of the 51st Front of the Revolutionary Armed Forces of Colombia (FARC), poses for a picture at a camp in Cordillera Oriental, Colombia, August 16, 2016. A peace deal will end half a century of war and allow the rebels to reintegrate into Colombian society. (Photo by John Vizcaino/Reuters)