https://www.eurekalert.org/news-releases/1112347
A new study of growth patterns in the bones of Tyrannosaurus rex has contradicted previous reports that it stopped growing in its mid-20s. The work also adds to recent evidence indicating that specimens previously thought to be juvenile T. rex were a different species.
Dr Holly Woodward Ballard, a professor of anatomy at Oklahoma State University, and co-authors have tested this data using a combination of additional specimens, new techniques for reading the growth rings and statistical approaches not previously applied to this field. They conclude that it was only at about 40 that T. rex growth stopped, although it was slow for quite a while beforehand....
