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 & Mirka Federer: 5 Fast Facts You Need to Know. It was a literal and figurative match made in tennis heaven. Roger, 33, and Mirka Federer, 37, met in 2000 and quickly became one of the hottest couples on the international tennis circuit, even competing together at one point.