Theoretical physicists develop a mathematical model to explain how birds dip and dive in whirling flocks.
The sight of hundreds of starlings swooping and diving in unison at dusk is one of the wonders of nature.
Researchers in Italy have undertaken the most detailed analysis yet of the physics of these aerial stunts. "There is no leader in a flock; everyone imitates its neighbours," said Dr Antonio Culla of Università Sapienza in Rome.Why do starlings 'dance' in the sky? They then used computer simulations of an artificial flock of birds to check their mathematical model matched what happens in the real world.
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