Lake Vostok, the size of Lake Ontario, was only discovered in the last 40 years, as it's under 2 1/2 miles of this
[DOC] [TLE] Lake Vostok: Russian scientists confirm triumph as drilling is ... [PAR] Feb 9, 2012 ... After more than two decades of drilling in Antarctica, Russian scientists ... 
freshwater lake hidden under miles of ice for some 20 million years.