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New Study Reveals T. rex Took 35 Years to Reach Full Size

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Recent research indicates that the Tyrannosaurus rex took significantly longer to grow to its maximum size than previously believed. A study published in PeerJ shows that T. rex typically reached its adult weight of around 8 tons at ages 35 to 40, rather than the earlier estimate of 25 years. This new understanding comes from analyzing growth rings in fossilized bones using polarized light, revealing a slower growth rate influenced by environmental conditions and resource availability. The findings may also suggest that what was once thought to be a single species of T. rex could actually include multiple species or subspecies, contributing to ongoing debates in paleontology.

Key Details: • T. rex reaches adult size at 35-40 years, not 25. • Study published in PeerJ provides new insights into dinosaur growth. • Variability in growth rates suggests environmental influences. • Findings could indicate multiple species within what was considered T. rex.

research dinosaurs paleontology species tyrannosaurus

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University of EdinburghHolly WoodwardSteve BrusatteNathan MyhrvoldUniversity Estatal de OklahomaIntellectual Ventures

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