Unlike teeth, a beak would not rot, chip or fall out. This would make it "more robust and practical", said Dr Gareth Fraser.
http://www.iol.co.za/scitech/science/news/forget-brushing-teeth-just-polish-beak-1.1542223
http://www.iol.co.za/scitech/science/news/forget-brushing-teeth-just-polish-beak-1.1542223
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