Snakes with hind legs were the old normal

A tiny, perfectly preserved 3D fossil from Argentina tells us more about an early snake.

Illustration: Raúl Gómez
  • It turns out legs, and least back legs, were no passing fancy for some serpents.
  • Hind legs were found on Najash snakes, a bridge species between lizards and snakes.
  • A new study provides several new insights into Najash rionegrina.
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