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SAT, 3 OCT · 95 ITEMS
"Fossil mammal with reptile-like teeth alters understanding of mammalian evolution" — New Scientist · Science & Medicine
A newly described fossil of an early mammal (or close mammalian relative) with reptile-like teeth—specifically, teeth that were continuously replaced throughout life (polyphyodonty), unlike most modern mammals which have only two sets—is prompting paleontologists to revise the timeline and mechanisms of mammalian dental evolution. The creature was semi-aquatic, and its teeth suggest that the transition to the typical mammalian two-set dentition was not a simple linear progression.
The claim is reported by New Scientist, a reputable secondary source, and is based on a scientific study (likely a peer-reviewed paper) that has not yet been named in the highlight. The search results confirm the article's existence and its recent publication, but without the original paper, the specific fossil name and details remain inferred. The reporting is likely faithful to the primary source, but the solidity of the claim depends on the underlying study's methodology and peer review.
The article was published on 2 October 2026, making this genuinely new reporting on a fresh discovery.