"And with the right technology and the right experts and insights, we can eavesdrop on these ancient telephone calls ... rigging still standing. The Caspian Sea, which is virtually unexplored ...

BP plans to explore for new oil fields in the Azeri Caspian Sea, BP's upstream chief Gordon Birrell told Reuters.

The Caspian Sea in Central Asia, however, is by far the largest lake worldwide at a staggering 386,000 square kilometres, or 149,053 square miles. This area is approximately equal to that of Japan ...