Antarctic camp
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Russia finds lake untouched for at least 14 million years

9 February 2012 Last updated at 04:57 GMT

Russia says it has pierced through Antarctica's frozen crust to a vast, sub-glacial lake that has remained untouched for at least 14 million years.

Scientists believe Lake Vostok may reveal unknown organisms and clues to life on other planets.

Tom Esslemont reports.