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Researchers crack cuckoo egg mystery

Science Centric (22 Sep 2010 18:30 GMT) - Researchers at the University of Sheffield have discovered that cuckoo eggs are internally incubated by the female bird for up to 24 hours before birth, solving for the first time the mystery as to how a cuckoo chick is able to hatch in advance of a host's eggs and brutally evict them…

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