Dr Horace Wells was about to change history in the brutal world of 19th-century dentistry, where hygiene was neglected and pain was unavoidable. Dealing with patients without anaesthesia made dentistry rough, bloody, and excruciating. But Wells had a radical idea—self-experimentation. He decided to test the effects of laughing gas on himself to see if it could revolutionize medical tests. Could this science experiment truly transform the history of dentistry, or would it lead to unexpected consequences? Find out more on Dark Matters: Twisted But True, only on Discovery Channel. Do not forget to LIKE, Share and Comment on our Videos Watch the Full Episodes of Lost Essence of India season 2 - https://bit.ly/LostEssenceofIndiaFullEpi Watch the best moments of Man Vs Wild with PM Modi and Bear Grylls - https://bit.ly/ManVsWildPMModi Check out the Special Discover segment on Kashi Vishwanath Dham - https://bit.ly/KashiVishwanathDham Check out all the promos of the new series - https://bit.ly/DiscoveryChannelPromos Check out the Survival Lessons, Stories and Journey's into the wild: http://bit.ly/SurvivalStories-DualSur... Watch Animal Attacks caught on CAM: http://bit.ly/AnimalAttacksonCAM Check out the Incredible Animal Species caught on CAM on Fierce: http://bit.ly/IncredibleAnimalSpecies... Check out Nature's Rage caught on Camera: http://bit.ly/WeatherGoneViral Check out the best of Discovery channel in a nutshell: http://bit.ly/BESTofDiscovery Watch the Incredible stories of Modern India http://bit.ly/StoriesOfModernIndia Find out about what it takes, to be a Great Indian Factory http://bit.ly/2rzPAfq Check out how Indian Brave-Hearts train and the vigorous skills required to survive in "Breaking Point" http://bit.ly/2DalTnK Follow us on our Social Media pages Facebook: www.facebook.com/DiscoveryChannelIndiaOfficial/ Twitter: twitter.com/DiscoveryIN Instagram: www.instagram.com/discoverychannelIn/ #DiscoveryChannel #DiscoveryChannelShows #NewShows #DiscoveryChannelIndia #India #NewShowPromo #Promos #IndiaStartUpstories #Discover #Discover #Discovery