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 Federerâs 2017 Australian Open draw. The draw gods have been kind to Federer as he prepares for his first competitive match since Wimbledon last year. The Swiss great will face a qualifier in the first and second rounds before potentially renewing his rivalry with Tomas Berdych in the third round.