Time Dilation

Diagram showing how gravitational time dilation can account for observed redshift

Albert Einstein predicted relativistic time dilation: the faster we go the slower time passes. At the speeds that humans travel it's inconsequential. It's a diversion away from the more significant gravitational time dilation.

The Physics of Hell

The popular science (SciPop) rationalization for the liquid outer core is an ephemeral strand of wispy logic. It predates Stephen Hawking but it's an example of the Hawking Effect. All it has to do is sound plausible.