Dinosaurs first emerged 10 million years earlier than previously thought

undefined 5, 2026

Source: interestingengineering

A new study suggests dinosaurs first appeared 10 million years earlier than previously believed, emerging around 250–240 million years ago instead of about 230 million years ago. Researchers analyzed fossil ages and anatomical data across major dinosaur groups, finding their early evolution was marked by rapid bursts of diversification, known as evolutionary radiation. These bursts were likely triggered by mass extinctions, reshaping dinosaur development. The findings help clarify long-standing uncertainties about dinosaur origins and early evolution.

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