Profile on Edith Widder, bioluminescence expert that took enormous steps in understanding animals behaviour in the deep sea. Subscribe to Earth Unplugged for more amazing animal videos - bit.ly/SubscribeToEarthUnplugged Watch more videos from Earth Unplugged: Stunning Animal Slow Motion Time-lapses: bit.ly/EarthUnpluggedSlowMotionTimelapse Expedition and Location Films: bit.ly/EarthUnpluggedExpeditionsAndLocationFilms Big Questions with Maddie Moate: bit.ly/BigQuestionsWithMaddieMoate Wilderness Sessions: bit.ly/WildernessSessionsFilms (ARCHIVE VIDEO TITLE) (ARCHIVE VIDEO DESCRIPTION About BBC Earth Unplugged: We're Earth Unplugged and we make videos about the incredible natural world and the animals that live here. From animal behaviour in slow motion to educational videos, expedition films and more! Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: tinyurl.com/YouTube-BBCEarth-FanPanel This is a channel from BBC Worldwide who help fund new BBC programmes. Service information and feedback: www.bbcworldwide.com/ContactWizard