CHAPTERS (click blue links to go to that time code in video. 0:00 Introduction 0:36 1600s–1800s 1:11 Bathymetry reveals ridges 1:30 Wegner’s Continental Drift 2:11 Radioactive decay 2:50 Nuclear bomb testing 3:13 Marie Tharpe/ocean ridges 3:46 Harry Hess/seafloor spreading 4:02 Seafloor magnetic stripes 4:17 Hot-spot formation 4:35 Three Boundary types 4:52 Mantle convection/gravity The theory […]
Tag: layers of the earth
Journey To The Earth's Core | Is There A Hidden Inner World?
There’s a very prevalent myth that the Earth is a hollow sphere, and beneath the crust, there is a whole new world full of superbeings and unimaginable phenomena. The hollow Earth theory is now completely rejected and has no basis in reality. Now we know that Earth is a solid ball of rock with an […]
What's Actually Inside the Earth's Core? | Journey to the Center of the Earth
Have you ever wondered how we *really* know what’s at the center of the Earth? Thanks to some amazing scientific insights, we know a lot about the interior of our planet – even though we’ve never even made it through the crust. Join Hank Green for a new geological episode of SciShow! Support SciShow by […]