Lake Vostok..my thoughts

It was such a thrilling moment when I read the news about the Lake Vostok that has been discovered in Antarctica. It is going to give us an insight on how the world existed before 15 million years ago. The vastok station base was established in Antarctica by Russia to study the ice composition and conduct experiments on atmosphere in arounds 1970s. And what makes it soo special is that the vastok station is the coldest place on earth about minus 89 degree Celsius. It takes about 1000 kilometer tractor journey to reach the vastok station from the edge of antarctic. Initially question arises how can a lake exist in such a coldest place ? If the surface temperature is around  minus 80 degrees at the bottom at least half of it  minus 40 or worst case 0 is enough to make the water freeze.. The fact is that the lake exists under the massive ice sheet  about 4 km thick and stretching for about 150 km under the massive ice. Even though the temperature at the bottom should also be proportional as the temperature of the ice.. the pressure of tons of ice is soo intense and the earths geothermal heat makes the lake in liquid state for over a millions of years and in fact untouched by human. Scientists predict that the water should be twice as pure as a double distilled  water. And the organisms existing in that ecosystem can throw light on evolution of living things on earth.
Studying the vastok also gives scientists an opportunity to study similar climate conditions in other planets especially jupiter and saturns moons which have a icy surface. One aspect that I'm not happy about was the way the drilling of the 4km ice happened. Since the climate is too cold in antarctic, there are chances that the drilling hole will freeze again and the hole might get closed by the drilling water hence the engineers used kerosene and some other solutions for keeping the hole from freezing. But only recently they have come up with a hot water drilling method using which the hole is drilled. Whatever be the method the lake must not be spoiled as that is the only evidence that there was some thing existed in our earth millions of years ago and which can still be seen !