A recent study revealed the first estimate of the number of dinosaurs commonly referred to as "T. rex" during the 2.4 million years they inhabited western North America, before their extinction 66 million years ago.
Researchers relied on what is known as Damuth's Law, which correlates the number of a specific species with its body mass. As animal size increases, the population of individuals typically decreases, according to an article on "nbcnews."
Factors considered by the researchers included geographic range, body mass, growth patterns, age at sexual maturity, average lifespan, generation length, and the total time T. rex existed.
According to the analysis, the estimated total number of T. rex dinosaurs that ever lived is around 2.5 billion, with approximately 20,000 adults existing at any given time. Scientists have discovered fossils of more than 40 T. rex dinosaurs since they were first described.
This species was among the largest carnivorous dinosaurs, possessing a skull length of about 1.5 meters. It also had a strong sense of smell, powerful legs, but weak arms with only two-fingered claws.
