Animals
How Do Birds Migrate Thousands of Miles: Navigation, Fat, and Flight
An Arctic tern chick hatches in Greenland, fledges, and within weeks makes its first 70,000 km round-trip migration to Antarctica — a journey it has never made before, with no experienced adult to follow. By the end of its 30-year life, it will have flown the equivalent of three trips to the Moon and back. The mechanisms behind this feat involve quantum physics, internal clocks, and a navigation system more sophisticated than anything human engineers have yet replicated.