One of the great questions in life. Clearly, this had been plaguing Alana Sharp, a postdoctoral researcher from Australia, so much that…

Note: This guest post was contributed by Andrea Castelli. Andrea had published this in an earlier version elsewhere, but has updated it…

Tetrapod is the name given to any vertebrate animal with four (tetra) legs (pod). There are more than 30,000 living species of…