The $1 Billion Journey to the Mantle of the Earth

In an unprecedented $1 billion mission to reach the Earth's mantle, geologists are set to start drilling 3.7 miles (6 km) beneath the seafloor, to reach the Earth's mantle. And according to project co-leader Damon Teagle, "It will be the equivalent of dangling a steel string the width of a human hair in the deep end… » 10/02/12 3:30pm 10/02/12 3:30pm