Weather

89°F8:19 PM

Community

1 read

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

KVIA•Thursday, January 15, 2026 at 5:31 PM•CNN Newsource

People gathering representing community events and culture

Want the full story?

Read the complete article at KVIA

AI Summary

A recent study published in the journal PeerJ has revealed that Tyrannosaurus rex took significantly longer to reach its maximum size than previously believed, growing to around 8 tons by the age of 35 to 40 years. This research, which utilized polarized light to uncover hidden growth rings in T. rex fossils, suggests that the dinosaurs grew slowly and had variable growth rates influenced by environmental factors. The findings contribute to the understanding of T. rex's role as an apex predator and raise questions about the classification of the species, hinting at the possibility of different subspecies. The study's insights may also prompt a reevaluation of growth rate analysis methods in paleontology.

Key Details: • T. rex typically reached maximum size between 35 to 40 years old. • The study analyzed growth rings from 17 individual specimens. • Growth rates varied significantly due to resource availability and environmental conditions. • Potential implications for the classification of T. rex and related species.

research dinosaurs paleontology t-rex species

People & Organizations

University of EdinburghHolly WoodwardSteve BrusatteNathan MyhrvoldOklahoma State UniversityPeerJ

Related Articles

Louvre Museum Director Steps Down Following Major Jewel Heist

Laurence des Cars, the director of the Louvre Museum, has resigned amid ongoing scrutiny following a high-profile jewel heist that occurred on October 19, 2025. The robbery, which involved the theft of $102 million in jewels, has led to the arrest of at least seven suspects, although the stolen items have not been recovered. French President Emmanuel Macron acknowledged her resignation as a necessary step for the museum to regain stability and focus on security improvements. Notably, Empress Eugénie's crown was the only item not stolen, but it was damaged during the incident. The museum's security flaws, including an easily guessable password for its surveillance system, have raised serious concerns about its safety protocols.

U.S. Embassy Lifts Shelter Order in Mexico, Normal Operations Resumed

The U.S. Embassy and Consulates in Mexico have announced that U.S. citizens are no longer required to shelter in place following a military operation on February 22. Public transportation and businesses are returning to normal, with flight schedules in Guadalajara and Puerto Vallarta also stabilizing. Although some roads in Jalisco State remain partially closed, both airports are secure. U.S. government staff in certain areas are still under curfews. Citizens are advised to confirm flight statuses, monitor local updates, and communicate their whereabouts to family and friends.

Iranian University Students Protest Against Regime Amidst Security Clashes

In Iran, university students have engaged in protests for the fourth consecutive day, voicing their dissent against the government and its leadership. These demonstrations began over the weekend to mark 40 days since nationwide protests were violently suppressed. Footage shows students burning flags and chanting against Supreme Leader Ali Khamenei. The Iranian Minister of Science warned that 'agitators' will face serious repercussions, while government spokespersons acknowledged the right to protest but emphasized respect for national symbols. Cultural policy makers have called for stricter enforcement of regulations in universities, condemning recent actions as unacceptable, particularly during the holy month of Ramadan.

Beloved Actor Robert Carradine Passes Away at 71, Remembered by Family

Robert Carradine, known for his roles in 'Revenge of the Nerds' and 'Lizzie McGuire', has died at the age of 71. His brother, Keith Carradine, described him as the 'bedrock of his family', highlighting the deep familial bonds among the Carradine actors. Carradine's passing marks a significant loss in the entertainment community, as he was not only an actor but also a cherished family member. Fans and loved ones are mourning his death and celebrating his contributions to film and television.