Why Do T-Rex Dinosaurs Have Mini Arms? Scientists May Have Discovered the Reason
Yahoo • • science
Key Points:
- New research published by The Royal Society reveals that T-Rex’s small arms evolved simultaneously with the growth of their large skulls, indicating a correlation between reduced forelimbs and increased cranial robusticity.
- Scientists studied 85 non-avian theropod species and found that forelimb reduction occurred in at least five carnivorous lineages, including tyrannosaurids, abelisaurids, and carcharodontosaurids, which also exhibited gigantism and robust skulls.
- The study suggests these dinosaurs shifted from using their forelimbs to subdue prey to relying primarily on powerful bites and strong skulls, with T-Rex having the largest head among the species examined.
- Lead author Charles Roger Scherer explained that T-Rex attacked prey headfirst as the most effective strategy, but the exact function of their small arms remains uncertain and requires further research.