But when the question of how to explore the lake came up, not long after its discovery, the Vostok scientists faced a serious dilemma. The lake is under immense pressure, and to breach the ice would have devastating consequences.
Roger Federer: Swiss star will play on until at least 2019. Updated 1815 GMT (0215 HKT) February 21, 2017. Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.
Roger Federer is one of the most respected people on the planet, and is regarded by many to be greatest tennis player of all time. But what else apart from his racquet skills adds to this popularity? One such quality the Swiss man possesses is his ability to communicate fluently in a variety of languages.