sentences:  The Russians resumed drilling into the lake in January 2012 and reached the upper surface of the water on 6 February 2012.The researchers allowed the rushing lake water to freeze within the bore hole and months later, they collected ice core samples of this newly formed ice and sent to the Laboratory for Glaciology and Environmental Geophysics in Grenoble, France, for analysis.Scientists first reported evidence of microbes in the accretion ice in 1999.