Laser Scanning Reveals Cathedral’s Mysteries | National Geographic

Tech-savvy art historian Andrew Tallon uses lasers to unlock the builders secrets behind the construction of the National Cathedral in Washington, D.C. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world s premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what s possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Click here to read more about how historians use lasers to learn about the past: http://news.nationalgeographic.com/2015/06/150622-andrew-tallon-notre-dame-cathedral-laser-scan-art-history-medieval-gothic/ VIDEOGRAPHER AND EDITOR: Spencer Millsap ADDITIONAL IMAGES: Andrew Tallon SPECIAL THANKS: Washington National Catherdral Laser Scanning Reveals Cathedral’s Mysteries | National Geographic https://youtu.be/jAi29udFMKw National Geographic https://www.youtube.com/natgeo