Here is a more accessible explanation for those (like me) who are unfamiliar with the maths: <a href="https://www.sciencealert.com/earth-s-core-is-2-5-years-younger-than-its-crust-thanks-to-the-curvature-of-space-time" rel="nofollow">https://www.sciencealert.com/earth-s-core-is-2-5-years-young...</a>
> The pedagogical value of this discussion is to show students that any number or observation, no matter who brought it forward, must be critically examined.<p>Excellent, I hope this value is also encouraged more in schools now than when I was there.
It seems like it would be the opposite:<p>- If you are smack dab in the middle of the Earth, although you'd be mashed, gravitational forces should be equal in all directions and therefore cancel out to zero.<p>- Ergo, if you are on the surface of the Earth, gravity should make your clocks run slower than in the middle.<p>What am I missing that makes this untrue?
> Comments: Published version, apart from minor editing (e.g. corrections of 'center' to 'centre')<p>> Journal reference: Eur.J.Phys. vol. 37, 035602 (2016)<p>If Brexit occurs, Britain will no longer be a European nation, and therefore the European Journal of Physics will no longer be obliged to accept "centre" as the standard spelling of "center", right?