Researchers examined every body vertebra in 13 Australian snakes and found five distinct regions, including a short neck just 7 to 12 vertebrae long

By measuring every vertebra along the bodies of 13 native Australian snakes, evolutionary biologists have discovered that a snake's spine is much more organized than previously believed. Instead of being one long, uniform structure, it contains five distinct anatomical regions, including a surprisingly short neck made up of just 7 to 12 vertebrae.

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