in my work as related to studies of the pastrana in the antarctic their ice cores being drilled there about 10 centimeters in diameter and up towards 3 kilometers known. researches from various countries drill through the antarctic more using their unique mess. but only at the russian station have drillers managed to reach the ice boundary. and then make water where they stopped. apparently there's no way to take water samples from the lake without introducing contaminating microorganisms. so far we have no way of knowing whether there is life in the most ancient water on earth but paleoclimatologists have found material that is just as valuable for their research. is the only archive where you can have similar tain as least stored that temperature history of the earth and similar tain is lead to the same times also the composition of the atmosphere of these times so we can directly go into the ice and find ot the contents of this atmosphere is specially sealed to. and from this c o 2 measurements we know form from the last 800000 years. with the only. person that that isn't what do.