Tuesday, September 13, 2016

"Why Ancient Pacific mariners were the NASA scientists of their day"


Early human settlement of the offshore Pacific revolved, in part, around enduring, large-scale meteorological phenomena that are still little understood. Most of these phenomena relied on what the maritime historian Brian Fagan called ‘an elaborate, usually slow-moving waltz involving two partners – the atmosphere and the ocean’. The local seasonal winds, combined with large but predictable long-term climatological events the size of continents, could be used to propel people from one archipelago to another.

We can draw a rough analogy between this climatologically assisted exploration of the remote outer Pacific and the careful interplanetary techniques of gravity-assisted space travel. Imagine, for example, a well-organised group of extreme maritime navigators standing on the shores of an isolated Pacific island chain 1,000 years ago, looking much further out to sea, knowing that there are distant land masses there, ever more island worlds whose presence is implied by the behaviour of the winds, clouds and currents.

More important, from generations’ worth of experience navigating the vast and inhospitable space of the Pacific, these same families know that only a particularly strong atmospheric cycle will be able to take them there – and that they must wait another season, another year, another decade, for these assistive winds to arrive. They are timing their launch.