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 considered by many sports analysts, media pundits, fellow players and fans around the world as the greatest tennis player of all time. Roger Federer has won an all-time record 17 Grand Slam Titles from 2003â12 including a joint all-time record of 7 Wimbledon Titles.