WASHINGTON, Jan. 23 — Call them “qucks” and “duails.” With a little egg tinkering, scientists replaced a duck’s flat bill with a quail’s pointy beak, breeding some funny-looking birds. But the experiment yielded more than an avian oddity. It uncovered some of the key cellular players in bird evolution — and more importantly, may lead to a better understanding of what causes facial birth defects such as cleft palate.
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Birds’ beaks switched for science
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