My cat used to drink from the garden pond and never seemed to suffer any ill effects, and you often see dogs drinking from muddy puddles. So why do humans have to be so careful and only drink clean water? Will it form sediment that gets buried beneath the seabed and eventually turns into plastic “oil” or “coal”? I had previously suspected that some tadpoles are late undergoing metamorphosis, but this one really missed the boat. Is this a recognised phenomenon, and what is the explanation? Is there an accepted ratio or does it vary, and if so by how much?
Bird brains predate birds themselves: ‘Flight
This is what archaeologists use to determine the age of human-made artifacts. But carbon dating won’t work on dinosaur bones. The half-life of carbon is only 5, years, so carbon dating is only effective on samples that are less than 50, years old.
funny dating video dinosaur brains. An archive in canada holds prints of many of this series, and it really is past time for some enterprising business to release it on to ‘s no masterpiece, but it does have the distinction of being the first british made filmed crime series shown in britain.
The first position is probably the most consistent with the mainstream view. There are also no written accounts or oral traditions which speak of dinosaur-like creatures living in the area. It seems that if they were common enough for thousands of figures to be produced depicting them, the giant beasts would also show up more often in local traditions – just like jaguars and butterflies do.
One website in favor of their authenticity states that there is no recent native pottery tradition in the area. On the other hand, if this claim is accurate, the figurines need not have been produced in the area either – even if they are just an elaborate hoax. Some of the clay figures from the huge collection.
List of State Fossils
An article in the January National Geographic boldly proclaimed: The evidence, however, reveals an entirely different story. Hubbard found elegant drawings of an elephant, an ibex, a dinosaur, and other animals. He stated concerning the dinosaur drawing:
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Sousa et al show that the human brain is not only a larger version of the ancestral primate brain but also one filled with distinct and surprising differences. Andre Sousa, a postdoctoral researcher at the Yale School of Medicine. To pinpoint differences among primate brains, Dr. Sousa and co-authors evaluated brain tissue samples from six humans, five chimpanzees, and five macaques.
They generated transcriptional profiles of tissue samples in total, representing several different brain regions hippocampus, amygdala, striatum, mediodorsal nucleus of thalamus, cerebellar cortex, and neocortex. Ying Zhu, also from the Yale School of Medicine. The authors also focused on one gene, TH tyrosine hydroxylase , which is involved in the production of dopamine, a neurotransmitter that regulates motor behavior, motivation, pleasure and emotional arousal.
They found that the TH gene was highly expressed in human neocortex and striatum but absent from the neocortex of chimpanzees. The team also found higher levels of expression of the gene MET , which is linked to autism spectrum disorder, in the human prefrontal cortex compared to the other primates tested.
Paleontologist Dave Hone recently compiled a list of eight persistent falsehoods over at the Guardian —from the misapprehension that all dinosaurs were huge to the untenable idea that Tyrannosaurus could only scavenge its meals—but there was one particular misunderstanding that caught my attention. For decades, popular articles and books claimed that the armor-plated Stegosaurus and the biggest of the sauropod dinosaurs had second brains in their rumps. It was a cute idea, but a totally wrong hypothesis that actually underscores a different dinosaur mystery.
Dinosaur brain expert Emily Buchholtz outlined the double brain issue in the newly-published second edition of The Complete Dinosaur.
Dinosaur intelligence has been a point of contention for paleontologists. Non-avian dinosaurs were once regarded as being unintelligent animals but have largely been appraised more generously since the dinosaur renaissance.
Description[ edit ] The anatomy of pterosaurs was highly modified from their reptilian ancestors by the adaption to flight. Pterosaur bones were hollow and air-filled, like the bones of birds. They had a keeled breastbone that was developed for the attachment of flight muscles and an enlarged brain that shows specialised features associated with flight.
Wings[ edit ] Reconstructed wing planform of Quetzalcoatlus northropi A compared to the wandering albatross Diomedea exulans B and the Andean condor Vultur gryphus C. These are not to scale; the wingspan of Q. Pterosaur wings were formed by membranes of skin and other tissues. The primary membranes attached to the extremely long fourth finger of each arm and extended along the sides of the body to the ankles.
While historically thought of as simple leathery structures composed of skin, research has since shown that the wing membranes of pterosaurs were highly complex dynamic structures suited to an active style of flight. The outer wings from the tip to the elbow were strengthened by closely spaced fibers called actinofibrils. The function of the actinofibrils is unknown, as is the exact material from which they were made.
Dinosaurs had brains similar to crocodiles or birds, British paleontologists have revealed Image: The specimen is thought to have come from a large plant eater such as Iguanodon, which lived about million years ago. Scientists believe the dead dinosaur’s head was buried in mud at the bottom of a swamp, allowing its brain to be “pickled” and preserved.
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Firstly, it should be needless to say that it is impossible to reconstruct an entire hypothetical ancient animal based on a few teeth! There is no belief of dinosaurs in the Native American religion or tradition. For that matter, why were there no discoveries prior to the nineteenth century in any part of the world? All these places were inhabited and well-explored for thousands of years before this time, why had no one ever found a dinosaur fossil before?
Marsh is said to have discovered over different ancient species including 80 dinosaurs, while Cope discovered Out of the dinosaur species supposedly discovered by the two men, however, only 32 are presently considered valid; the rest have all proven to be falsifications and fabrications!
Dinosaurs Among Us
Visit Website Samples of the mineralized collagen fibers extracted by the team. After finding what looked like red blood cells in two of the fossils, the researchers explored the possibility that the blood might be the result of historical contamination; for example, a curator or collector might have had a cut when they handled the specimen. But when they sliced through one of the red blood cells and saw what looked like a nucleus, they felt confident the blood was not human.
Red blood cells of humans, like other mammals, are unusual among vertebrates because they lack a cell nucleus. While examining a cross-section of a fossilized rib bone, the researchers spotted bands of fibers. When tested, the fibers were found to contain the same amino acids that make up collagen, the main structural protein found in skin and other soft tissues.
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Read the article on one page In the forest the human brain was expanding and expanding at a phenomenal rate. Sometime at around , to , years ago, this process came to an end. The brain stopped expanding and started to shrink. This key point in our evolutionary journey has been noted but rarely addressed, and its significance comprehensively ignored. Hominid brains appear to have remained fairly constant in size for a long period from some 1. But then, from , to , years before the present, fossils show that the cranial capacity of our ancestors skyrocketed.
Brain mass peaked at about 1, grams 3. Since then brain mass has declined to the 1, grams 2. Of course, brain size alone does not tell the whole story. Yet we have done this by shrinking our bodies to a greater extent than our brains have shrunk. There is some evidence that our brains are still shrinking and that they may have done so over the last ten thousand years by as much as 5 percent. The human brain is shrinking faster than the shrinkage of the body.
Brains On! Science podcast for kids by American Public Media on Apple Podcasts
See Article History Alternative Titles: Dromaeosauridae, raptor Dromaeosaur, family Dromaeosauridae , any of a group of small to medium-sized carnivorous dinosaurs that flourished in Asia and North America during the Cretaceous Period Agile, lightly built, and fast-running, these theropods were among the most effective predators of their time.
All dromaeosaurs were bipedal, and the second toe of each foot was extremely flexible and bore a specialized killing claw, or talon, that was not used in walking. Instead, it was always held off the ground because it was much larger and was jointed differently from the other claws. The largest killing claw belonged to Deinonychus and measured up to 13 cm 5 inches in length.
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World’s oldest dinosaur embryo bonebed yields organic remains April 10, The great age of the embryos is unusual because almost all known dinosaur embryos are from the Cretaceous Period. The Cretaceous ended some million years after the bones at the Lufeng site were buried and fossilized. Scientists out for dinosaur blood June 9, Scientists said Tuesday they have discovered what appear to be red blood cells and collagen fibres in dinosaur bones, a find that may boost prospects of prising organic remains from a much wider range of fossils.
For that reason, nearly all study of dinosaur soft tissue has to be reconstructed from fossil bones. However, researchers in the United Preserved dinosaur cells found, but scientists still can’t build Jurassic World June 10, The science behind the Jurassic Park films always seemed far-fetched, even before the latest instalment, Jurassic World, introduced the idea of genetically engineered super-dinosaurs. Did dinosaurs have lips? June 2, Can a crocodile’s smile reveal whether dinosaurs had lips?
What if lips and gums hid most of dinosaur’s teeth? Fossilized dinosaur brain tissue identified for the first time October 27, An unassuming brown pebble, found more than a decade ago by a fossil hunter in Sussex, has been confirmed as the first example of fossilised brain tissue from a dinosaur. Recommended for you Chew on this:
New fossils are redefining what makes a dinosaur
Destination England, where Garnett recognises him and details Jimmy to tail him. He meets Miss Kelly a teacher Jane Hylton , and Jimmy overhears plans for a robbery, the prize, a million! He joins the gang. In a Rolls, they drive to the airport dressed as pilots and board a Pan Am plane.
Jan 15, · Scientists determine the age of dinosaur bones by dating the fossils and the surrounding rocks. Read about radiometric dating and other techniques. and conventional wisdom about fossilization is that all soft tissue, from blood to brains, decomposes. Only hard parts, like bones and teeth, can become fossils. The short half.
Kea can solve logical puzzles, such as pushing and pulling things in a certain order to get to food, and will work together to achieve a certain objective. Bird intelligence deals with the definition of intelligence and its measurement as it applies to birds. Traditionally, birds have been considered inferior in intelligence to mammals , and derogatory terms such as bird brains have been used colloquially in some cultures. The difficulty of defining or measuring intelligence in non-human animals makes the subject difficult for scientific study.
Anatomically, a bird has a relatively large brain compared to its head size. The visual and auditory senses are well developed in most species, while the tactile and olfactory senses are well realized only in a few groups.