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This Ancient Reptile Started Life on All Fours. As It Grew, It Stood Upright and Started Walking on Two Legs Instead

Researchers analyzed over 950 bones from 36 individuals to reveal a growth-linked shift from four-legged to two-legged locomotion in Sonselasuchus cedrus.

Summary by Smithsonian Mag
Scientists have identified a strange early crocodile relative that may have looked somewhat like a flightless bird

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This Ancient Reptile Started Life on All Fours. As It Grew, It Stood Upright and Started Walking on Two Legs Instead

Scientists have identified a strange early crocodile relative that may have looked somewhat like a flightless bird

·United States
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The IndependentThe Independent
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The Independent (US)The Independent (US)
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‘Peculiar’ ancient crocodile walked on four legs as a baby – before switching to two

The fossils, which are more than 200 million years old, were unearthed in Arizona

·London, United Kingdom
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The Independent broke the news in London, United Kingdom on Wednesday, March 11, 2026.
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