Military volunteers and civilians take a shooting training at a range in Rostov region on November 11, 2022, amid the ongoing Russian military action in Ukraine. (Photo by AFP Photo/Stringer)

The king penguin in his moulting suit joins his waddle on their way to the water despite not being waterproof yet at Volunteer Point on the Falkland Islands, 2023. (Photo by Judy Rogero/Media Drum Images)

In this photo taken on July 19, 2014, a man looks at an excavation as an A.R.M.H., Association for the Recovery of Historical Memory, volunteer digs on the search for the body of Perfecto de Dios, in a hidden grave in Chaherrero, Spain. Across Spain, volunteer teams of archeologists, anthropologists and forensic scientists head out every year on expeditions to dig for suspected mass graves – a legacy of Spain's fascist past during the time of General Francisco Franco. (Photo by Daniel Ochoa de Olza/AP Photo)

A volunteer photographs a woman as she kisses a volunteer wearing a condom costume during marking the International Condom Day in Kiev, Ukraine, 13 February 2015. The event was organized to promote and create awareness towards “Safe s*x” and the use of condoms to control and prevent Human Immunodeficiency Virus (HIV) and other sexually transmitted diseases on the occasion of the International Condom day. (Photo by Roman Pilipey/EPA)

Volunteers from the South Carolina Aquarium release a rehabilitated Loggerhead Sea Turtles on May 18, 2012 in Isle of Palms, South Carolina. The turtle was one of two that were rescued and nursed back to health by the sea turtle hospital at the aquarium. (Photo by Richard Ellis)

A volunteer poses for a photograph with a snowman depicting the Beijing Winter Olympics mascot Bing Dwen Dwen at National Biathlon Centre in Zhangjiakou, China on February 13, 2022. (Photo by Kim Hong-Ji/Reuters)

Members of the Territorial Defence Forces and volunteers place anti-tank obstacles at a checkpoint, as Russia's invasion of Ukraine continues, at the Independence Square in central Kyiv, Ukraine on March 3, 2022. (Photo by Valentyn Ogirenko/Reuters)

Volunteers distribute water to a woman carrying a child along a street during a hot summer day in Karachi on May 14, 2022. (Photo by Rizwan Tabassum/AFP Photo)