{
  "id": 177105,
  "title": "80-million-year-old snake brain reveals a surprising evolutionary secret",
  "url": "https://urgent.news/2026/08/05/80-million-year-old-snake-brain-reveals-a-surprising-evolutionary",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-05T11:42:51.000Z",
  "source": {
    "name": "ScienceDaily",
    "slug": "sciencedaily",
    "url": "https://www.sciencedaily.com/releases/2026/08/260804034619.htm"
  },
  "original_language": "en",
  "account": "Over 4,000 snake species exist today, descended from lizard ancestors with heavily modified bodies. However, scientists lack a complete understanding of how snakes evolved their elongated, limbless forms. Early snake fossils are scarce, making it difficult to determine the environmental factors and behaviors that drove their evolution. For decades, researchers debated two primary theories: snakes either began their elongation and limb loss while adapting to underground life or in aquatic environments. New research published in Nature suggests a more complex answer. Early snakes, according to the study, occupied various habitats and developed distinct sensory adaptations, rather than following a single ecological route. The research, led by Tiago Simões of Princeton University, examined a newly identified snake species from Late Cretaceous deposits in southeastern Brazil, around 80 million years ago. Named Tametara mirim, this species boasts one of the most complete fossil snake skeletons ever found. Through computed tomography and 3D rendering, the team created a detailed digital reconstruction of Tametara mirim's skull, vertebrae, and brain endocast. This reconstruction revealed brain and sensory features that would have been challenging to study from the exposed bones alone. Comparing Tametara with another fossil snake, Dinilysia patagonica, from Argentina, the team discovered that the two species had significantly different brain structures, indicating they were adapted to different lifestyles. Tametara was adapted to burrowing, while Dinilysia was suited for life on the ground. The study's findings show that early snake evolution involved repeated movements between burrowing, terrestrial, and marine lifestyles, much earlier than previously thought. Different snake lineages explored various habitats, developing adaptations suited to their respective ecological settings. The brain provides a more comprehensive story than the skeleton alone. By combining brain reconstructions with data from living snakes, the researchers demonstrated that early snakes did not simply progress toward a modern condition but experimented with different sensory and ecological strategies. This indicates that early snakes did not follow a single evolutionary pathway.",
  "summary": "An exceptionally preserved snake fossil from Brazil reveals that early snakes were far more diverse than scientists once thought. Detailed brain reconstructions show that Tametara mirim was adapted for burrowing, while another ancient snake was suited to life above ground. Other fossils point to marine lifestyles as well. By 80 million years ago, snakes were already experimenting with very…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}