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flag A new study finds T. rex took 35–40 years to mature, much longer than earlier estimates.

flag A new study of 17 T. rex fossils reveals these dinosaurs took 35 to 40 years to reach full maturity, far longer than the previously believed 20 years. flag Using bone microstructure analysis, researchers found growth patterns indicating gradual development, with some variation possibly due to environment, injury, or species differences. flag The findings, based on cross-polarized light imaging and mathematical reconstruction, suggest a lifespan of at least 35–40 years and a mass of 8.8 tons or more. flag Experts say the study reshapes understanding of dinosaur growth and may prompt reevaluations of other species.

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