Textbooks might have to be re-written when it comes to some of the earliest creatures, a study suggests.

Researchers have found that our understanding of the anatomy of the first four-legged animals is wrong.

New 3D models of fossil remains show that previous renderings of the position of the beasts' backbones were actually back-to-front.

The findings, published in the journal Nature, may even change our thinking on how the spine evolved.


Vertebral architecture in the earliest stem tetrapods : http://www.nature.com/nature/journal...ture11825.html