How a Frozen Earth Gave the Moon Its Shape

It might look like a perfect circle, but the Moon is actually wider than it is tall. Now, new calculations indicate that the Moon’s shape is a remnant of a time when Earth might’ve been covered in a single, global ice sheet. Host: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, D.A. Noe, alexander wadsworth, سلط الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://onlinelibrary.wiley.com/doi/10.1002/2017GL076278/full https://www.colorado.edu/today/2018/02/06/fossilized-feature-records-moons-slow-retreat-earth http://www.astronomy.com/magazine/bob-berman/2017/03/a-perfect-circle https://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html https://www.space.com/19275-moon-formation.html https://astronomy.stackexchange.com/questions/420/why-is-the-moon-receding-from-the-earth-due-to-tides-is-this-typical-for-other https://astronomy.stackexchange.com/questions/1859/when-did-the-moon-stop https://ntrs.nasa.gov/search.jsp?R=19990114316 http://www.bbc.co.uk/science/earth/earth_timeline/snowball_earth ---------- Images: https://en.wikipedia.org/wiki/Moon#/media/File:LRO_WAC_Nearside_Mosaic.jpg http://www.thinkstockphotos.com/image/stock-illustration-vector-cartoon-flat-globe-character/838336870 http://www.thinkstockphotos.com/image/stock-illustration-planet-and-stars-in-space/522398066 https://www.flickr.com/photos/projectapolloarchive/22318005702/ https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10930 http://www.thinkstockphotos.com/image/stock-photo-full-moon-in-clouds-over-sea-in-night/828004900/popup?sq=M%7CImages%20similar%20to:%20828004900%7C828004900/f=CPIHVX/s=DynamicRank https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA17182 http://www.thinkstockphotos.com/image/stock-photo-ice-formations/77744897/popup