How GPS works

GPS is one of these things a child could very easily expose your shallow knowledge of. What is it? Well, that thing where some satellites tell your phone where you are. Yes, but really, what is it? And how does it work, exactly? This is a fantastic — I’m not exaggerating — explorable explainer that will leave you in awe, of the ingenuity of GPS, and of how one can make such a complex thing so tangible.