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.
The Argentine is currently playing the Sydney International and will play the Australian Open next week. âI was close to change, but I'm not feeling 100 percent at the moment,â said del Potro, who joked that if he does break both racquets in Melbourne, he will ask fellow Wilson player Roger Federer to borrow one. âHopefully me and Wilson, we want to change, [we are] really close and really soon.