Lake Vostok is a large subglacial lake located beneath the Antarctic ice sheet, near the Russian research station, Vostok Station. It is one of the largest lakes in the world, measuring about 250 kilometers long and 50 kilometers wide. The lake is covered by approximately 4 kilometers of ice, making it one of the most isolated bodies of water on Earth. Discovered in the 1970s, Lake Vostok has been of great interest to scientists due to its unique ecosystem and the potential for discovering ancient microbial life. The lake has remained sealed off from the outside world for millions of years, providing a unique environment for research into extremophiles and the effects of climate change on polar regions.