I’ve already told some of you about this, but now we spread the word. Don’t miss the Nova special, Great Human Odyssey, a two-hour PBS program that ran on October 5, I think (we caught it last night online). One of its segments that particularly fascinated me was the story of early, thousands-of-years-ago Polynesian navigation and how recreations of the same watercraft using ancient navigation skills — no charts, no GPS, no instruments, just reading the stars and flows of ocean currents — is being employed to circumnavigate the world in a three-year voyage, currently underway. Read more about the voyage here.