New Research Suggests The T. Rex Had A Longer Lifespan Than Previously Believed — And Didn’t Reach Full Size Until 40 Years Old
Earlier studies suggested that the Tyrannosaurus rex died by age 30, but recent research into the growth rings in the leg bones of 17 T. rex specimens has revealed that the creatures continued to grow until they were at least 40.
By Austin Harvey
•
Jan 27, 2026
News
New Research Suggests The T. Rex Had A Longer Lifespan Than Previously Believed — And Didn’t Reach Full Size Until 40 Years Old
Earlier studies suggested that the Tyrannosaurus rex died by age 30, but recent research into the growth rings in the leg bones of 17 T. rex specimens has revealed that the creatures continued to grow until they were at least 40.
By Austin Harvey
•
January 27, 2026