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 Australian Open 2017 latest news, results, draw and upcoming matches: Federer to face Zverev. 1  Roger Federer's latest news and results from the Australian Open as the 17th seed plays with his lowest seeding at a major since 2001.