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)

Women dressed in folk costumes take part in a traditional wedding ceremony in the village of Galicnik, west of Macedonia's capital Skopje, July 12, 2014. The Galicnik Wedding, a three-day traditional Macedonian wedding celebration held each “Petrovden” or St. Peter's Day, involves traditional customs, costumes, and rituals and dances that have been passed down over the centuries. (Photo by Ognen Teofilovski/Reuters)

A woman peels potatoes for sale at a market located along a railway line in West Jakarta, Indonesia March 1, 2016. (Photo by Garry Lotulung/Reuters)

In this March 29, 2016 photo, a man shoulders a coffin with the remains of a loved one who was slain more than two decades ago by Shining Path rebels, as he walks to the cemetery for a group burial service, in Ccano, a village in the Huanta area of Ayachcuo department, Peru. Presidential candidate Keiko Fujimori's base of support is in places like Ccano, where promises to build roads, clinics and schools recall her agronomist father’s own legacy of delivering aid to the long-overlooked countryside. (Photo by Rodrigo Abd/AP Photo)

A young couple rest on a bench, as a street actor wearing an Angel costume speaks on the phone in Nikolskaya street near the Kremlin in Moscow, Russia, Wednesday, March 31, 2021. (Photo by Alexander Zemlianichenko/AP Photo)

Su-25 jet fighters release smoke in the colours of the Russian state flag over Red Square during a flypast rehearsal ahead of a parade on Victory Day, which marks the anniversary of the victory over Nazi Germany in World War Two, in Moscow, Russia on May 5, 2021. (Photo by Shamil Zhumatov/Reuters)

People walk down a makeshift modeling runway as they take a break from marching during the Brooklyn Liberation's Protect Trans Youth event on June 13, 2021 in the Brooklyn borough in New York City. Brooklyn Liberation organized a march and rally as an emergency action response to legislation to restrict trans rights across 34 states. According to the Human Rights Campaign, there have been over 250 bills introduced in state legislatures aimed at the LGBTQ community in 2021. (Photo by Michael M. Santiago/Getty Images)

A model prepares backstage during the body painting show : Miracle World The Ocean organized by Unipa Surabaya at Grand Atrium Royal Plaza on June 21, 2021 in Surabaya, Indonesia. (Photo by Robertus Pudyanto/Getty Images)