Story Brief

The embryo shows right-handed coiling. Diaz, California State University Los Angeles An international team led by Canadian researchers has found evidence explaining why snake embryos form a curious spiral. This ability to coil as embryos enables snakes to hatch with the longest bodies of all vertebrates. The study, published in the journal Current Biology , reports that snake embryos coil into a right-handed spiral as their long bodies grow while tethered by the gut.

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