Coloured X-ray of a barn owl. A physicist has used X-ray to create an extraordinary collection of artwork. Arie van't Riets pictures reveal birds, fish, monkeys and flowers in an incredible new light. The 66-year-old, from Bathmen in the Netherlands, began X-raying flowers as a means to teach radiographers and physicians how the machine worked. But after adding a bit of colour to the pictures, the retired medical physicist realised the potential for an exciting new collection of art. (Photo by Arie van't Riet/Barcroft Media)

Only the most intrepid urban explorers cross the tattered ruins of the old Iron Curtain to endure the excessive bureaucracy, military paranoia and freezing winds of the East to hunt for the ghosts of an empire. Rebecca Litchfield is one who couldn’t resist the haunting allure of the ruins of the Soviet Union.

Pretty Girls, Ugly Faces is a photo fad in which girls take pictures of themselves while posing in an unflattering manner, making a silly face or performing a physically strenuous activity.

A dog sits with a competitor dressed as Santa Claus before an annual charity Santa fun run in Loughborough, central England December 7, 2014. (Photo by Darren Staples/Reuters)

English actress Florence Pugh attends the “Don't Worry Darling” red carpet at the 79th Venice International Film Festival on September 05, 2022 in Venice, Italy. (Photo by Vittorio Zunino Celotto/Getty Images)

American actress Kiernan Shipka poses with “May flowers” in Venice, Italy in the last decade of May 2022. (Photo by kiernanshipka/Instagram)

Vanessa Low of Team Australia celebrates after winning gold in the Women’s Long Jump - T63 Final on day 9 of the Tokyo 2020 Paralympic Games at Olympic Stadium on September 02, 2021 in Tokyo, Japan. Low jumped 5.28m to set a new world record. (Photo by Athit Perawongmetha/Reuters)

American actress and model Megan Fox attends Audacy Beach Festival at Fort Lauderdale Beach on December 04, 2022 in Fort Lauderdale, Florida. (Photo by Jason Koerner/Getty Images for Audacy)