2021/04/17 17:51 Sue the T-rex at Chicago s Field Museum. Sue the T-rex at Chicago s Field Museum. (Wikimedia Commons photo)
If one Tyrannosaurus rex the school bus-sized meat-eating dinosaur that stalked the Cretaceous Period landscape seems impressive, how about 2.5 billion of them?
Researchers on Thursday unveiled the first calculation of the total T. rex population during the estimated 2.4 million years that this fearsome species inhabited western North America during the twilight of the age of dinosaurs.
They considered factors including the size of its geographic range, its body mass, growth pattern, age at sexual maturity, life expectancy, duration of a single generation and the total time that T. rex existed before extinction 66 million years ago. They also heeded a doctrine called Damuth s law linking population to body mass: the bigger the animal, the fewer the individuals.
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Scientists Finally Know How an Ancient Reptile Lived With Such an Absurdly Long Neck
1 APRIL 2021
Make a crocodile out of taffy. Take its head and tug on it until its neck extends a good few meters from its body. If you squint, this could be what one odd-looking Triassic reptile called
Tanystropheus looked like. More or less.
This animal s assortment of ludicrously long fossilized neck bones has confused the heck out of paleontologists for nearly 170 years. By using CT scans to unpack the crushed skulls of the reptiles remains, researchers finally resolved some nagging questions surrounding this strange animal in August last year.