Neutrinos & GPS

Here's a GPS mention in an older xkcd strip by Randall Munroe

The "title-text" at the actual webcomic says:

I can't speak to the paper's scientific merits, but it's really cool how on page 10 you can see that their reference GPS beacon is sensitive enough to pick up continential drift under the detector (interrupted halfway through by an earthquake).

And while we're at it, we should mention that the Nobel Prize in Physiology or Medicine went to some scientists who discovered how the brain understands where the body is, i.e. the brain's GPS.