Russians Drill to Lake Vostok, Two Miles below Antarctic Ice

One of the biggest lakes in the world is two miles below Antarctica, covered by ice for thousands of years. Russian researchers claim they've already broken through the icy surface of Lake Vostok; the US is reportedly not far behind. What will happen when the seal is broken? Marc Kaufman is science writer at the Washington Post and author of First Contact: Scientific Breakthroughs in the Hunt for Life Beyond Earth.