Stunning images taken by Sean Lenz, 19, and Kristoffer Abligaard, 20, show picturesque waterfalls transformed into vibrant rainbows of colour. The awe-inspiring images were created by clever use of long exposure photography and glow sticks floating through water. Photo: Picturesque waterfalls transformed into rainbows of colour. (Photo by Sean Lenz/Kristoffer Abildgaard)

A fox runs out onto the pitch before the start of the second half. Celtic League 2012/13, Round 19, Leinster v Ulster, RDS, Ballsbridge, Dublin, March 30, 2013. (Photo by Paul Mohan)

In this Saturday, April 13, 2019, file photo, Mariah Bell, center, of the U.S. reacts to her score with her teammates after performing her women's free program routine during the ISU World Team Trophy Figure Skating competition in Fukuoka, southwestern Japan. (Photo by Toru Hanai/AP Photo)

Sloth “Paula” hangs from a branch in her enclosure at the zoo in Halle an der Saale, eastern Germany, on June 14, 2019. The two-toed sloth celebrated her 50th birthday and is, according to the zoo, the oldest sloth of the world. (Photo by Hendrik Schmidt/dpa/AFP Photo)

National Police members disinfect Venezuelan citizens returning to the country from Colombia, as a preventive measure against the spread of the coronavirus –COVID19- at the Simon Boliviar International Bridge, in Cucuta, Colombia-Venezuela border, on April 4, 2020. Since the first case of COVID-19 was detected last March 6, Colombia has reported 1,406 people infected and 32 dead. (Photo by Schneyder Mendoza/AFP Photo)

A protester poses for photos next to a burning police vehicle in Los Angeles, Saturday, May 30, 2020, during a demonstration over the death of George Floyd. a black man who was killed in police custody in Minneapolis on May 25. (Photo by Ringo H.W. Chiu/AP Photo)

A little girl wearing a face mask dances in front of a toy panda at a shopping area in Shanghai, following the coronavirus disease (COVID-19) outbreak, China on June 16, 2020. (Photo by Aly Song/Reuters)

A Palestinian girl wearing a protective face mask looks on as she sits in a box on the back of a bicycle amid the coronavirus disease (COVID-19) crisis, in Gaza City on September 27, 2020. (Photo by Mohammed Salem/Reuters)