SciShow

Who Melted the Earth? (2014x32)

: 28, 2014

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!