Leatherback turtles fascinate ocean researchers. The largest of sea turtles roams the world's oceans, nesting and feeding in coastal regions. Scientists say leathernecks have been doing so for at least 65 million years. But little else is known to researchers about this species, other than their numbers are dwindling.

Recently, U.S. National Oceanic and Atmospheric Administration scientists strapped a transmitter on one and were amazed by what they found. Paul Sisco has more.