| Link | Quote | Stars | Tags | Author |
| 73f3c5d | With his marine clocks, John Harrison tested the waters of space-time. He succeeded, against all odds, in using the fourth--temporal--dimension to link points on the three-dimensional globe. He wrested the world's whereabouts from the stars, and locked the secret in a pocket watch. | marine-chronometer marine-clock longitude longitude-act | Dava Sobel |