The Secret World Deep Inside Antarctica's Southern Ocean

We know more about the surface of the moon than we do about the Antarctic Twilight Zone. Stretching from 30 to 200 meters deep, this "middle world" is home to some of the most fragile ecosystems and marine life on the planet. Researchers say studying this little-known world is key to protecting vulnerable species and the future of our oceans. Watch the full video to know MO.