Zhang Jinduo's wife tries on a self-made racing car on the outskirts of Shenyang, Liaoning province May 10, 2008. Zhang, the 53-year-old local farmer made the racing car with the help of his son who is a car mechanic. The car is equipped with a rear-mounted motorcycle engine and can achieve 60-80 km per hour, according to local media. (Photo by Reuters/Stringer)

In this February 2, 2015 photo, tourists jump as they pose for a picture, after disembarking from the Ocean Nova cruise ship, on King George Island, Antarctica. This tourist season, which runs November through March, more than 37,000 visitors are expected to walk on the coldest continent on Earth, about 10 percent more than the year before. (Photo by Natacha Pisarenko/AP Photo)

A man yells for help minutes after a Serb shell hit a crowded pedestrian walkway in Sarajevo, May 1993. Radovan Karadzic, a 70-year-old former psychiatrist, still in robust health, is the most senior political figure to be convicted by the International Criminal Tribunal for the Former Yugoslavia. He was found guilty of 10 out of 11 charges. He was acquitted of a second count of genocide in Bosnian towns. (Photo by Reuters)

A 10-year-old boy living on the streets of New Delhi lies down on cascading water of a fountain in the gardens of the India Gate monument on May 20, 2016. The Indian Meteorological Department issued warnings of “severe heat wave” conditions across large parts of India's north and west, including the capital Delhi, where temperatures hit 47 degrees Celsius. (Photo by Roberto Schmidt/AFP Photo)

Men sleep at a 24-hour McDonald's restaurant in Hong Kong, China November 10, 2015. A large number of homeless people sleeping on the street has long been been a problem in Hong Kong mainly due to its high rent and soaring property. In recent years, McDonald's 24-hour fast food shops opening all over the city have become popular alternatives for people, know as McRefugees or McSleepers, to spend the night in a safer and more comfortable way than on the street. (Photo by Tyrone Siu/Reuters)

Women work on a colourful display of paper flowers ready to be showcased during the traditional Tet Nguyen Dan festival in Thanh Tien, Vietnam early February 2024. Tet celebrates the arrival of Spring according to the Vietnamese calendar, often celebrated in the early weeks of February, and is this year being held on February 10. (Photo by Nguyen Sanh Quoc Huy/Solent News)

A girl holds her newly purchased pet cat while posing for a photograph at a pet shop in Srinagar, the summer capital of Indian Kashmir, 10 November 2025. Kashmir is seeing more pet owners, especially of Persian cats. Over 6,000 cat bite cases were reported last year, accounting for nearly half of the rabies control budget. Experts urge vaccination as demand for pedigree pets continues to rise. (Photo by Farooq Khan/EPA)

Among the fish populations that could be harmed by the Xayaburi dam in Laos is the critically endangered Mekong giant catfish, considered by the Guinness Book of World Records to be the world’s largest freshwater fish. The fish, which grows to 650 pounds and about 10 feet long, is only found in the Mekong River. It is migratory, moving between downstream habitats in Cambodia upstream to northern Thailand and Laos each year to spawn. Some experts fear the Xayaburi dam could block the migration and drive the giant catfish to extinction. (Photo by Courtesy of Zeb Hogan/University of Nevada, Reno)