The HMAS Adelaide is scuttled off the coast of Avoca Beach on April 13, 2011 in Gosford, Australia. After the scuttling was succesfully protested in 2010, today the HMAS Adelaide was finally scuttled off the NSW Central Coast to create an artifical reef, the first of its kind in this state. (Photo by Brendon Thorne/Getty Images)

A baby hippopotamus lies next to its mother on the first day it was presented to the public at the Zoo Berlin zoo on November 1, 2011 in Berlin, Germany. The baby hippo was born at the zoo on October 23. (Photo by Sean Gallup/Getty Images)

Nursery plants are seen placed in people's seats during a rehearsal as Barcelona's Gran Teatre del Liceu opera reopens its doors with a concert for plants, to raise awareness about the importance of an audience after the coronavirus lockdown, in Barcelona, Spain on June 22, 2020. The Gran Teatre del Liceu reopens its doors, in which the 2,292 seats of the auditorium will be occupied on this occasion by plants. It will be on 22 June, broadcast live online, when the UceLi Quartet string quartet performs Puccini's “Crisantemi” for this verdant public, brought in from local nurseries. (Photo by Nacho Doce/Reuters)

A boy poses for a picture amid clashes between supporters of Shiite Muslim cleric Moqtada and Iraqi security forces in Tahrir Square in the centre of Iraq's capital Baghdad on September 28, 2022, during a parliament session in the nearby high-security Green Zone across the Tigris river. Three rockets were fired at Baghdad's Green Zone, wounding seven security force personnel as parliament was holding its first session in two months, Iraq's security forces said. The parliament, at the centre of a months-long political paralysis, met for the first since deadly unrest in August to vote on the resignation of its speaker. (Photo by Ahmad Al-Rubaye/AFP Photo)

This photo taken on November 6, 2023 shows people posing for photos next to the statue of “Hachiko” in front of Shibuya station in central Tokyo, ahead of the 100th anniversary of the legendary dog's birth this month. A century since its birth, the tale of the loyal companion who had waited at the Shibuya train station for its master to come home – not knowing he had already died – continues to inspire the public, who have made the statue a singular landmark at a glitzy hub of Tokyo's street culture. (Photo by Richard A. Brooks/AFP Photo)

An adult female Masai giraffe rears on its hind legs as it resists efforts by Kenya Wildlife Services (KWS) rangers to guide it into a transportation crate using ropes during an exercise to translocate large herbivores from Kedong Ranch due to land subdivisions and corralling that have disrupted wildlife migratory routes in Naivasha, Nakuru County, on November 16, 2025. Driven by two long ropes held by about twenty rangers, the blindfolded giraffe enters a tall trailer that is to transport it out of its natural habitat in the Rift Valley, which is deteriorating after having been resold. This is the first step in a meticulous relocation operation in the vast Kedong ranch, part of an ancestral corridor between Mount Longonot and Hell's Gate Park, near the iconic Lake Naivasha. (Photo by Tony Karumba/AFP Photo)

Yueyaquan is a crescent-shaped lake in an oasis, 6 km south of the city of Dunhuang in Gansu Province, China. It was named Yueyaquan in the Qing Dynasty. According to measurements made in 1960, the average depth of the lake was 4 to 5 meters, with a maximum depth of 7.5 metres In the following 40 years, the depth of the lake continually declined. In the early 1990s, its area had shrunk to only 5,500 m2 with an average depth of 0.9 meter (maximum 1.3 meter). In 2006, the local government with help of the central government started to fill the lake and restore its depth; its depth and size have been growing yearly since then. The lake and the surrounding deserts are very popular with tourists, who are offered camel and 4x4 rides.