Lake Vostok has been capped with Antarctic ice for at least 15 million years. Now scientists have drilled 13,000 feet to reach its surface. They'll soon learn what life forms have adapted to that cold, dark locale.
A British court is hearing a final appeal from Julian Assange, the founder of the WikiLeaks whistleblower site, to avoid extradition to Sweden to face sex crime allegations. Here are four questions about the man and the case.