From birth to adulthood, T. rex took 40 years growing into an eight-ton giant, and scientists think that long childhood helped it dominate the dinosaur world

New research reveals Tyrannosaurus rex took longer to reach its massive size than previously thought, growing for about 40 years instead of 20. This extended development, uncovered through advanced bone analysis, suggests a slower, more gradual maturation process. The study also hints that famous fossils like 'Jane' might represent a different species, challenging long-held assumptions about the iconic dinosaur.