-http://www.ucmp.berkeley.edu/geology/techist.htm
-https://science.nasa.gov/science-news/science-at-nasa/2000/ast06oct_1
-https://www.livescience.com/37706-what-is-plate-tectonics.html
-https://www.youtube.com/watch?v=SYOarZKipnU
-https://www.youtube.com/watch?v=rM8KrmRedSw