80-Million-Year-Old Brazilian Fossil Reveals How Snakes Evolved From Limbed Ancestors

Eighty million years after a small reptile was swallowed by Brazilian sediment, its fossilized remains have surfaced to illuminate one of evolution's most profound mysteries: how a lineage of four-legged creatures gradually surrendered their limbs and became snakes. The specimen, named Tametara mirim, captures an animal mid-transformation — neither fully limbed nor fully limbless — offering paleontologists a rare glimpse into the slow, multidirectional process by which body plans are unmade and remade. Its preserved brain structure suggests that as legs disappeared, the mind itself was reorgan