Explore our planet's last great uncharted territory! From record-breaking depths to wild animal encounters, no aspect of the ocean is too extreme for National Geographic Explorer Sylvia A. Earle. Journey with Earle from the vibrant shallows to the cold, dark mysteries of the seafloor as she investigates an amazing diversity of little-known creatures and habitats, and works to save an ocean in trouble. Offering expert advice, DIY experiments, how-to...