Big Ideas: Stone Age DNA And History's Largest Deep Sea Mining Operation

Scientists use saliva from a 5,700-year-old "chewing gum" to reconstruct the complete human genome of a woman who lived on an island in the Baltic Sea around 3,700 B.C. Plus, Earth's magnetic north pole is slowly moving toward Russia. And, history's largest underwater mining operation is about to begin.

Big Ideas: Stone Age DNA And History's Largest Deep Sea Mining Operation