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Great circle routes: how sailors navigate a sphere using a flat map and a changing compass

Great circle routes: how sailors navigate a sphere using a flat map and a changing compass Posted: September 1, 2026 | Last updated: September 1, 2026 On a globe, the shortest path between two ports ...
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Science says birds can navigate using Earth’s magnetic field, here’s how their invisible compass may work

Every year, migratory birds travel thousands of kilometres across landscapes they may never have encountered before, yet many can maintain remarkably consistent directions. Scientists have long known ...