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.
35 facts that prove Roger Federer is the greatest tennis player ever. 1. Federer is only the first man in the last 45 years to appear in four Grand Slam finals in the same year. And heâs done it a staggering three times, winning three of the four titles in 2006 and 2007 and going 2-2 in 2009.