A new volunteer for the Ukrainian interior ministry's “Azov” battalion takes part in tests before heading to frontlines in eastern Ukraine, at the battalion's training centre in Kiev, Ukraine, August 14, 2015. (Photo by Gleb Garanich/Reuters)

Janus, a two-headed Greek turtle named after the Roman god with two heads is testing a kind of skateboard to rehabilitate one day ahead of her 25th birthday at the Natural History Museum in Geneva on September 2, 2022. (Photo by Pierre Albouy/Reuters)

The Eiffel Tour-the body language of balance. I came across this group of young adults from Sarajevo, Bosnia, having fun testing their balance two nights ago in on the Esplanade de Trocadero. (Photo and comment by Peter Turnley)

Kambeba Indian, Dream Braga, 18, aims his arrow in a jungle near the village Tres Unidos, Amazon state May 9, 2015. Dream Braga has been shooting fish with a bow and arrow for most of his life. In the Amazonian village where he grew up, that was what kids did for food and fun. He participated in the Indigenous Archery Project which recruits Amazon native children to compete with modern archery equipment and try for a place on the national team, with the 2016 Olympics in Rio de Janeiro as their ultimate goal. After training with Olympic coaches for three months, he has now been promoted to Brazil's national team. (Photo by Bruno Kelly/Reuters)

Stagecoach tests the amphibious bus, on the River Clyde on February 9, 2010 in Glasgow, Scotland. The Ј700,000 Dutch made amfibus could eventually replace the existing ferry service which is being scraped in March due to costs. (Photo by Jeff J Mitchell/Getty Images)

Sue Bunclark, 40, from Rotherham poses for a photograph besides her 1964 first generation or T1, split-screen Volkswagen Transporter Samba van in Newquay on August 6, 2014 in Cornwall, England. The van, which she and her family have owned for five years is nicknamed Sammy. The Volkswagen Transporter was first produced in 1950 and has sold over ten million units worldwide evolving through five generations of functional and practical body styles, each representing the ultimate multi-purpose vehicle of its time. To commemorate the model's 60th anniversary in the UK Volkswagen has launched a special edition of the Transporter dubbed the Sportline 60. (Photo by Matt Cardy/Getty Images)

Ukrainians jump over a bonfire in Kiev, Ukraine, 06 July 2019, as they celebrate the traditional pagan holiday of Ivana Kupala. Ivana Kupala is celebrated, during the summer solstice, on the shortest night of the year, marking the beginning of summer and is celebrated in Ukraine, Belarus, Poland and Russia. People sing and dance around bonfires, play games and perform traditional rituals. Young people jump over bonfires in order to test their bravery. Couples holding hands jump over the flames to test their love. If the couple does not succeed it is predicted to split up. Traditionally, children and young unmarried women wear wreaths of wild flowers on their heads to symbolize purity. (Photo by Sergey Dolzhenko/EPA/EFE)

US marines watch the mushroom cloud from an atomic explosion rise above the Yucca flats, Nevada during a US nuclear weapons test. (Photo by Keystone/Getty Images). USA, 1945