Take me away, deer, Russia. The Nenet people of Arctic Russia use reindeer and sledges as a prime mode of transport. The animals’ navigational ability means that in severe conditions they are sometimes the only hope of survival. (Photo by Kamil Nureev/Smithsonian Photo Contest)

The fourth annual BigPicture Natural World Photography Competition aims to celebrate the diversity of life on Earth, and encourages people to protect and conserve it. Here: “The Salmon Catchers”. Terrestrial Wildlife. To capture this view of a mother grizzly bear and her cub, photographer Peter Mather set up a camera trap on a log that he knew the bears tended to traverse while fishing for salmon, in the Yukon River watershed in Canada. (Photo by Peter Mather/BigPicture Natural World Photography Competition 2017)

A girl walks along former railway tracks in the so- called “Tunnel of Love”, surrounded by arches of intertwined trees, near the Ukrainian village of Klevan, Rivno region, on August 6, 2018. The tunnel of about five kilometres in length is a botanical phenomenon, which became a cult place for tourists and couples in love. The tourist legend says that wishes of couples in love will come true, if the couple passes through the tunnel. (Photo by Sergei Supinsky/AFP Photo)

The current world Champions in the Men's and Women's RS:X, Piotr Myszka of Poland and Blanca Manchon of Spain arrive at Bathers Beach carrying the ISAF World Championships Flag to be raised to officially open the 2011 ISAF Sailing World Championships on December 2, 2011 in Perth, Australia. (Photo by Mark Dadswell/Getty Images)

Mr Lordi aka Tomi Petteri Putaansuu of the Finnish hard rock band Lordi gets the second jab of his Covid-19 vaccination from nurse Paula Ylitalo (R) in Rovaniemi, Finland, on August 1, 2021, amid the novel coronavirus / COVID-19 pandemic. (Photo by Jouni Porsanger/Lehtikuva/AFP Photo)

Kevin Jay and Nigel Cox perform some light painting on the beach at Frinton-on-Sea in Essex, UK using colour changing LED light wands during a 25-second exposure on March 4, 2024. (Photo by Kevin Jay/Picture Exclusive)

An old car passes by while dark clouds are seen due to the tropical storm Idalia in Havana, on August 28, 2023. (Photo by Yamil Lage/AFP Photo)

A couple walks across the Francis Scott Key Bridge as the setting sun lights up the clouds in Washington, Friday, October 30, 2020. (Photo by J. David Ake/AP Photo)