NEW : Scientists hope samples will yield previously undiscovered life , clues of planet 's history . Russia says its scientists have reached the lake under 2 miles of ice . ( CNN ) -- Russian scientists briefly pierced the two-mile-thick veil over a freshwater lake hidden beneath Antarctica 's ice sheet for millions of years , polar researchers announced Wednesday . Score: 6
NEW : Scientists hope samples will yield previously undiscovered life , clues of planet 's history . Russia says its scientists have reached the lake under 2 miles of ice . Score: 6