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New study suggests dinosaur age estimates based on bone rings may be inaccurate due to multiple rings per year in crocodiles.
A new study challenges the long-held belief that dinosaur ages can be accurately determined by counting growth rings in bones, as researchers found Nile crocodiles can form multiple rings per year—up to five in two years.
Using antibiotic markers and microscopic analysis, scientists at a South African facility discovered that growth patterns in crocodiles, birds, and other reptiles may reflect cyclical growth rather than annual cycles.
While the findings suggest some dinosaurs may have been younger than previously thought, experts caution that the evidence isn't conclusive, and growth rings remain a useful, though imperfect, tool for studying dinosaur development.
The study was published in Scientific Reports.
Un nuevo estudio sugiere que las estimaciones de la edad de los dinosaurios basadas en anillos óseos pueden ser inexactas debido a múltiples anillos por año en los cocodrilos.