Wednesday - January 21, 2026
New study reveals the T. rex didn't reach full-size until age 40
January 14, 2026
STILLWATER, Oklahoma, Jan. 14 -- Oklahoma State University posted the following news:

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New study reveals the T. rex didn't reach full-size until age 40

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Media Contact: Sara Plummer | Senior Communications Coordinator | 918-561-1282 | sara.plummer@okstate.edu

For decades, scientists have been counting annual growth rings, similar to tree rings, found inside fossilized leg bones of Tyrannosaurus rex to estimate how old th . . .

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