People walk in the Old City of Damascus, Syria, decorated for the upcoming Christmas holidays, Tuesday, December 14, 2021. (Photo by Omar Sanadiki/AP Photo)

People walk on the Patriarch's bridge decorated for Christmas and New Year celebrations with the Christ the Savior Cathedral in the background in Moscow, Russia, Monday, December 16, 2019. (Photo by Alexander Zemlianichenko/AP Photo)

A visitor watches the exhibit “Enchanted: Forest of Light” at Descanso Gardens in La Canada Flintridge, California U.S., December 9, 2016. (Photo by Mario Anzuoni/Reuters)

The Christmas Train of Lights on November 27, 2024 on the Dartmouth Steam Railway in Devon, UK, which runs until 30th December 2024, is reflected in the calm water of the River Dart after leaving Kingswear on its return trip to Paignton. The carriages and steam locomotives on the festive service are lit inside and out with coloured lights. (Photo by Graham Hunt/BNPS)

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)

Visitors to the annual Vivid Sydney light festival wear matching illuminated suits alongside the Sydney Harbour Bridge on the second night of the light and sound show in Sydney, Australia, May 28, 2016. (Photo by Jason Reed/Reuters)