At the beginning of Mars, still covers of snow of the lake Baïkal, its deep water under seals of three feet of thick ice. During two next months, under the sun of luminous spring, the ice to defrost itself slowly in a punctuated process of crackings n' is not without pointing out the noise d' weapons. As long as the ice remains in place, however, the scientists can set up right camp in medium this 400-mile-length, deep 5,000-foot-lake. Russia known as " lake sacré" is of 25 d' million; years, the oldest lake on planet. It is also the deepest lake, which holds more d' water that l' together Big lakes d' North America joined together. C' is the aquatic life includes/understands more than 1.500 animal species and 1.000 plant species, of which two thirds are endemic. According to scientific navy Andy Rechnitzer, Baïkal is diversified biologically than the other lakes, because l' water rich in oxygen circulates of its surface for its deep depths, a process related to geothermic chimneys probable...