Dinosaurs may have been able to reach gargantuan proportions, but new research has found that their body densities still allowed them to stay above water.
April 13, 2021
Ossicones are columnar or conical skin-covered bone structures on the heads of giraffe and okapi (
Fig 1). Giraffe ossicones consist of a bone core covered with skin and attached to the skull with connective tissue. The bone, skin, and connective tissue of ossicones are all living growing tissues with blood vessels and nerves. All male and female giraffes have a pair of ossicones on the parietal bones of the skull. Males also usually have a single ossicone on the frontal bone. At around the age of sexual maturity, ossicones fuse with the underlying skull bone and growth continues as bone is added to the ossicone surface beneath the skin. Ossicones play a role in giraffe sexual behavior and may also be used for temperature regulation. Male–male combat over access to reproductive females usually consists of giraffes using their head as a club to deliver blows from ossicones to the body and legs of their opponent. The nerve bundles and large blood supply in the ossico
IMAGE: Skeletons of four tyrannosaurid specimens tested in the study view more
Credit: Clockwise from above left: adult Tyrannosaurus rex Sue (FMNH PR 2081) (Field Museum of Natural History, Chicago, IL; photo by the Field Museum), juvenile Tyrannosaurus rex Jane (BMRP 2002.4.1) (Burpee.
By closely examining the jaw mechanics of juvenile and adult tyrannosaurids, some of the fiercest dinosaurs to inhabit earth, scientists led by the University of Bristol have uncovered differences in how they bit into their prey.
They found that younger tyrannosaurs were incapable of delivering the bone-crunching bite that is often synonymous with the Tyrannosaurus Rex and that adult specimens were far better equipped for tearing out chunks of flesh and bone with their massive, deeply set jaws.
Bite of juvenile T. rex was less ferocious than an adult tyrannosaurus
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The juvenile Tyrannosaurus rex had a weaker bite than adult counterparts, according to a study by researchers in Britain. File Photo by John Angelillo/UPI
Tyrannosaurus rex dinosaurs were less powerful than those of their older counterparts, according to a new study.
The fossil record is rich with the bones of adult
T. rex dinosaurs, allowing for detailed analysis of the predator s powerful bite a bite strong enough to crush bones and help
T. rex take down large, plant-eating dinosaurs.
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Previously, scientists determined the adult
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The Down Under View: Dingoes on Dogs, Wolves, and Domestication
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