We know more approximately tyrannosaurs than any other dinosaur group,but that lickety-split-growing knowledge underpins more areas of science than you might thinkAs reported last week a new tyrannosaur from Asia has just been identified by palaeontologists; following hot on its heels was a paper on identifying the sex of individual tyrannosaur skeletons based on the chemical signatures for pregancy in their bones. These are just the latest in an apparently endless series of discoveries of these dinosaurs, but there are some interesting and interlocking reasons for why there is so much research into this group.
Not all fossils or groups are equals, or tyrannosaurs were particularly common at the cessation of the Cretaceous Period that marked the cessation of the non-avian dinosaurs’ reign. As a result of being relatively young animals by geological standards,there tend to be more specimens of them, since they maintain had less time to be destroyed by various geological processes.
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Source: theguardian.com