5 Kinds of Glass Made by Nature

Did you know that glass can be made in nature? In this episode of SciShow, Michael Aranda shows you 5 types of amazing glass naturally produced in nature. Let's go! Go to http://Brilliant.org/SciShow to try out Brilliant’s Daily Challenges. The first 200 subscribers get 20% off an annual Premium subscription. SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon:   / scishow   ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Avi Yashchin, Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook:   / scishow   Twitter:   / scishow   Tumblr:   / scishow   Instagram:   / thescishow   ---------- Sources: https://flexiblelearning.auckland.ac.... https://www.britannica.com/science/ob... https://www.sciencedirect.com/science... http://volcano.oregonstate.edu/book/e... https://www.mindat.org/min-8520.html https://www.sandatlas.org/volcanic-gl... https://www.mindat.org/min-3004.html https://pubs.geoscienceworld.org/msa/... https://pubsapp.acs.org/cen/whatstuff... https://australianmuseum.net.au/learn... https://www.mindat.org/min-32187.html https://www.ga.gov.au/education/class... https://cosmosmagazine.com/space/opal... https://australianmuseum.net.au/learn... https://www.britannica.com/science/te... http://www.jsg.utexas.edu/npl/outreac... https://ntrs.nasa.gov/archive/nasa/ca... https://oumnh.ox.ac.uk/fulgurites http://www.usfcam.usf.edu/cam/exhibit... https://link.springer.com/article/10.... https://www.mindat.org/min-2363.html https://blogs.discovermagazine.com/bu... http://glassspongereefs.com/the-disco... https://oceanservice.noaa.gov/facts/g... http://docs.niwa.co.nz/library/public... https://www.ncbi.nlm.nih.gov/pubmed/2... https://www.mpg.de/5595233/climate_ar... https://australianmuseum.net.au/learn... Image Sources: https://www.videoblocks.com/video/sem... https://commons.wikimedia.org/wiki/Ca... https://commons.wikimedia.org/wiki/Ca... https://commons.wikimedia.org/wiki/Ca... https://www.istockphoto.com/photo/lav... https://commons.wikimedia.org/wiki/Fi... https://www.videoblocks.com/video/rip... https://www.flickr.com/photos/jsjgeol... https://commons.wikimedia.org/wiki/Fi... https://www.istockphoto.com/photo/lun... https://www.istockphoto.com/vector/ea... https://www.istockphoto.com/photo/wat... https://en.wikipedia.org/wiki/Moldavi... https://en.wikipedia.org/wiki/Austral... https://en.wikipedia.org/wiki/Philipp... https://en.wikipedia.org/wiki/Fulguri... https://commons.wikimedia.org/wiki/Fi... https://en.wikipedia.org/wiki/Fulguri... https://commons.wikimedia.org/wiki/Ca... https://en.wikipedia.org/wiki/Fulguri... https://commons.wikimedia.org/wiki/Fi... https://en.wikipedia.org/wiki/Hexacti... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://www.istockphoto.com/photo/com...