Why Do People Hiccup?

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It’s safe to say you don’t remember your first hiccup, since it probably occurred before you were born. It is typical for developing human fetuses to have hiccups in the womb, and yet even though we experience them throughout our lifetimes, the cause of these involuntary actions has defied explanation.
To unravel the mystery of hiccups, which serve no obvious useful purpose, scientists are looking into our evolutionary past for clues among our distant relatives. One promising candidate: amphibians, in particular tadpoles.  more...