Jun 15
Quantum mechanics inside a bird's eye: how robins navigate 10,000 kilometres without GPS
The European robin is a small bird. It weighs less than a first-class letter. The brain of the European robin is roughly the size of a hazelnut. The European robin has never seen a map. Has never been taught a route by its parents. It does not have a satellite receiver or a gyroscope. It cannot phone home. Yet every year in October when the first frost hardens the moss in a forest, a European…