SciShow
Who Melted the Earth?
2014 • E32 Feb 28, 2014 10m
Hank clarifies, corrects, and generally straightens out the origins of the terrific heat inside the Earth. It's not only from the collisions and pressure that date back to Earth's formation, it also involves the transport of heavier elements toward the core and, more recently, the radioactive decay of elements. Sorry for the errors, Internet!