Please click here to try The Great Courses Plus: http://ow.ly/OoWp302du3z Click here if you're interested in subscribing: http://bit.ly/Subscribe2SED Smarter Every Day on Patreon http://www.patreon.com/smartereveryday ⇊ Click below for more links! ⇊ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Thank you to Science Alert for arranging my travel! http://www.sciencealert.com/ GET SMARTER SECTION The majority of the world's opal gemstones used for jewelry comes from Coober Pedy Australia: https://en.wikipedia.org/wiki/Coober_Pedy Opals are unique: https://en.wikipedia.org/wiki/Opal Yanni's Store and Museum: http://www.umoonaopalmine.com.au/ Opal can be created by plants! http://www.sciencedirect.com/science/article/pii/S0367253015001437 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Tweet Ideas to me at: http://twitter.com/smartereveryday I'm "ilikerockets" on Snapchat. Snap Code: http://i.imgur.com/7DGfEpR.png Smarter Every Day on Facebook https://www.facebook.com/SmarterEveryDay Smarter Every Day on Patreon http://www.patreon.com/smartereveryday Smarter Every Day On Instagram http://www.instagram.com/smartereveryday Smarter Every Day SubReddit http://www.reddit.com/r/smartereveryday Ambiance and musicy things by: Gordon McGladdery did the outro music the video. http://ashellinthepit.bandcamp.com/ The thought is it my efforts making videos will help educate the world as a whole, and one day generate enough revenue to pay for my kids college education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO! If you REALLY liked it, feel free to pitch a few dollars Smarter Every Day by becoming a Patron. http://www.patreon.com/smartereveryday Warm Regards, Destin