T. rex took 40 years to become fully grown

New ScientistWednesday, January 14, 2026 at 12:00:45 PM
NeutralScience
T. rex took 40 years to become fully grown
  • An analysis of growth rings in the leg bones of 17 Tyrannosaurus rex individuals indicates that these dinosaurs took approximately 40 years to reach full maturity, suggesting a slower growth rate than previously believed. This finding contributes to the understanding that T. rex may not represent a single species but rather a more complex evolutionary lineage.
  • The revelation of T. rex's prolonged growth period has significant implications for paleontological studies, as it challenges existing assumptions about dinosaur development and lifespan, potentially reshaping how researchers interpret fossil evidence.
  • This discovery aligns with ongoing discussions in paleontology regarding the diversity of dinosaur species and their characteristics, as seen in recent studies suggesting that other dinosaurs, like Diplodocus, may have exhibited vibrant colors, indicating a broader range of biological traits among these ancient creatures.
— via World Pulse Now AI Editorial System

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