The Arctic tern’s navigation
The Arctic tern crosses between the poles each year on a body of just over a hundred grams. It lives two summers, following the brightest place on earth for its whole life. With no map and no lesson, even a bird flying it for the first time finds the way.
| 첫째 단서 — 구조 | It weighs a little over a hundred grams. Hollow bones, feathers that shed water, wings proportioned to stay aloft for a long time. With that body it crosses between the poles every year. |
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| 둘째 단서 — 목적 | It lives two summers. Stitching the Arctic summer to the Antarctic one, it follows the brightest place on earth for its whole life. The migration is not the purpose. It is how the purpose is met. |
| 셋째 단서 — 질서 | No map, no lesson. Even a bird flying it for the first time finds the way. It is understood to read the angle of the sun and the earth's magnetic field — but what we know is the method, not how the method got inside the body. |
It crosses the planet without a map. And it comes back.