Kevin told me last night about an article he read about hiccups. Then I stumbled up a link about it today. I'm not sure if I believe this explanation, but it sure is interesting.
There are many similarities between hiccuping and gill ventilation in animals like tadpoles, the researchers argue. Both are inhibited when the lungs are inflated, for example, and by high carbon dioxide levels in air or water.
- From NewScientist.com
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