Why is it that a dog that barks for a whole weekend, practically non-stop, doesn鈥檛 lose its 鈥渧oice鈥�?
David Lockyer, Waterlooville, Hampshire, UK
We pay 拢25 for every answer published in New Scientist. To answer this question 鈥� or ask a new one 鈥� visit newscientist.com/lastword. Terms and conditions apply.
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