Greg Marshall is a scientist, inventor, and filmmaker who has dedicated the last 25 years to studying, exploring, and documenting life in the oceans.
 Beginning in 1986, he developed a revolutionary research tool to record images, sound, and data from an animal's perspective. Today that tool is called Crittercam. It has allowed us to see life from the point of view of whales, sharks, seals, turtles, penguins, even lions. He's won two Emmy Awards for the National Geographic television specials 'Great White Sharks' and 'Sea Monsters: Search for the Giant Squid.' Greg Marshall gives a presentation of his work in this podcast, recorded at the National Geographic Society in Washington, D.C. during the 2012 International Achievement Summit.