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)

Decaying fishing trawlers known collectively as The Fleetwood Wrecks, are seen at low tide on the banks of the River Wyre in Fleetwood, Britain on September 26, 2023. (Photo by Lee Smith/Reuters)

Autumn colors border a road leading through a small valley near Blankenburg am Harz, Germany, Wednesday, November 1, 2023. (Photo by Matthias Schrader/AP Photo)

The Prince Albert Cairn, built in 1862 by Queen Victoria, is surrounded by snow and ice, near Balmoral, Aberdeenshire, Scotland, Friday November 22, 2024. (Photo by Jane Barlow/PA Wire via AP Photo)

Santiago Eneme (second left) and his Equatorial Guinea teammates can’t watch during their last 16 penalty shoot-out with Mali, although they did go on to win at Limbe Omnisport Stadium in Limbe, Cameroon on January 26, 2022. (Photo by Thaier Al-Sudani/Reuters)

Relatives gather to demand that the government take action to secure the return of their relatives on the 33rd day of Israeli attacks on November 08, 2023 in Tel Aviv, Israel. (Photo by Nir Keidar/Anadolu via Getty Images)

Carey Williams leaps into the icy waters of the Snake River for the 2022 Polar Plunge at the Hells Gate Marina on Saturday, January 1, 2022, in Clarkston, Wash. (Photo by August Frank/Lewiston Tribune via AP Photo)

An employee controls the arms of a manned biped walking robot “METHOD-2” during a demonstration in Gunpo, South Korea, December 27, 2016. It stands 13-feet (3,96 m) tall, weighs 1.3 tons and wields a pair of 286-pound (129,73 kg), motion-tracking metal arms. (Photo by Kim Hong-Ji/Reuters)