The northern lights, or aurora borealis, appear in the sky over the Bamburgh lighthouse at Stag Rock in Northumberland, England on September 28, 2016. (Photo by Owen Humphreys/PA Wire via ZUMA Press)

West Virginia Gov. Jim Justice holds up his dog Babydog's rear end as a message to people who've doubted the state as he comes to the end of his State of the State speech in the House chambers, Thursday, January 27, 2022, in Charleston, W.Va. (Photo by Chris Dorst/Charleston Gazette-Mail via AP Photo)

A staff of the Beijing 2022 Winter Olympic Games holds a placard reading “Mask on” as USA's players react after their defeat in the women's gold medal match of the Beijing 2022 Winter Olympic Games ice hockey competition between Canada and USA, at the Wukesong Sports Centre in Beijing on February 17, 2022. (Photo by Kirill Kudryavtsev/AFP Photo)

Kelly Clarkson, Kelsea Ballerini and Carly Pearce perform at the 56th Annual CMA Awards at Bridgestone Arena in Nashville, Tennessee, U.S. November 9, 2022. (Photo by Mario Anzuoni/Reuters)

Red Bull's Max Verstappen celebrates with champagne on the podium after winning the Monaco Grand Prix in Monte Carlo on May 28, 2023. (Photo by Stephane Mahe/Reuters)

Isabeau Levito, of the United States, reacts at the end of her short program at the world figure skating championships in Montreal, Wednesday, March 20, 2024. (Photo by Graham Hughes/The Canadian Press via AP Photo)

Doris Dean of Chicago, Ill., sits with her gun shortly after she won a 50 meter, 40-shot event for women with a perfect 400 score at the National Rifle Association (NRA) matches at Camp Perry, near Toledo, Ohio, September 7, 1941. (Photo by AP Photo/DW)

Global wildlife populations will decline by 67% by 2020 unless urgent action is taken to reduce human impact on species and ecosystems, warns the biennial Living Planet Index report from WWF (World Wide Fund for Nature) and ZSL (Zoological Society of London). From elephants to eels, here are some of the wildlife populations most affected by human activity. Here: The maned wolf is among the large mammals in the Brazilian Cerrado that are threatened by the increasing conversion of grasslands into farmland for grazing and growing crops. (Photo by Ben Cranke/Nature Picture Library/Alamy Stock Photo)