Neil deGrasse Tyson Explains Why Rocks Float

Do rocks float? On this StarTalk explainer, Neil deGrasse Tyson and comic co-host Chuck Nice explore the idea that rocks are light...in density. You ll learn more about density as Neil and Chuck dive into the evolution of ships and how asymmetric advantages would work in an alien invasion. How did Earth’s early days impact the composition of its crust? Neil explains why rocks are the third lightest stuff on Earth. You ll also learn why the Earth is like a layered cocktail, how geophysicists figure out the density profile of the Earth, and why there seem to be so many meteorites in Antarctica. Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: YouTube: https://www.youtube.com/user/startalkradio?sub_confirmation=1 Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalkradio/ About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson