A plane drops water to put out the fire broke out yesterday in a grassy area in Kizilcahamam district of Ankara and spread to a forest area in Gerede district of Bolu as firefighters, Turkish General Directorate of Forestry teams and officers continue their extinguishing and cooling efforts in the forest fire that is under control on August 22, 2024 in Bolu, Turkiye. (Photo by Emin Sansar/Anadolu via Getty Images)

A common gallinule runs across the water to escape a nearby alligator at Green Cay Nature Center in Boynton Beach, Florida on September 4, 2025. Unlike most waterbirds, gallinules have long toes that allow them to walk on floating vegetation. The species is known for its loud, cackling calls that often echo through wetlands. (Photo by Ronen Tivony/NurPhoto/Rex Features/Shutterstock)

A milkman crosses through floodwater at Chak Ali Sher village in Wazirabad district on August 28, 2025, after government issued a flood alert for riverside areas of Punjab province. Water has gushed into the eastern province, Pakistan's breadbasket and home to about half of its 255 million people, with three transboundary rivers swelling beyond their banks. The latest monsoon downpour has killed at least 13 people, according to the National Disaster Management Authority. (Photo by Aamir Qureshi/AFP Photo)

A young Ukrainian woman wears an ear of grain braid during a traditional Ukrainian celebration of Kupalo Night, in Warsaw, Poland, on Saturday, June 22, 2024. Ukrainians in Warsaw jumped over a bonfire and floated braids to honor the vital powers of water and fire on the Vistula River bank Saturday night, as they celebrated their solstice tradition of Ivan Kupalo Night away from war-torn home. (Photo by Czarek Sokolowski/AP Photo)

Ryo Minemizu, one of Japan’s emerging stars in the field of marine life photography and the 2017 winner of the Nikkei National Geographic photography prize, captures the beauty and complexity of plankton that drift in our planet’s oceans and other bodies of water in meticulous detail. Here: Batesian mimicry by a Soleichthys fish larva. (Photo by Ryo Minemizu/The Guardian)

Underwater photographer Sarah Lee uses a technique known as “duck diving” to capture these stunning photos of surfers in Hawaii. Surfers “duck dive” under the water to avoid incoming waves so they can get further out to sea. Photo: A surfer comes free from her surfboard. (Photo by Sarah Lee/Caters News)

Tourist Michel Watson found this pink dolphin making a splash in Brazil. The unusual creature, which hides deep in the Rio Negro river, was spotted leaping out of the Amazonian water brandishing its bizarre bright bubblegum color. Weighing in at nearly 300 pounds, the curious animal, known as an Amazon Pink River Dolphin, looked unusually agile as it rose above the waves. (Photo by Michel Watson)

Lake Baikal is the world's oldest lake, at 25 million years (possibly older), and deepest, averaging 744.4 metres (2,442 ft).

Located in the south of the Russian region of Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, it is the most voluminous freshwater lake in the world, containing roughly 20% of the world's unfrozen surface fresh water.