Extinction Dinosaurs have become a fierce debate among scientists everywhere. Many theories emerge and break other theories.
The scientific analysis we make, in a long time ago where the new earth was formed, in the same air there is no oxygen, the content of dioxide is even very high. Along with building autotrophs, photosynthesis begins to wear dioxide and the process of making oxygen, thus changing the air environment on earth. At the same time, on one side of the dioxide through the counting of organisms through the sediment layers of coal and petroleum, and on the other side also through the presence or absence of sedimentary opportunities by using various carbonate formulations. And the sediment goes on and on.
The evidence shows that the viscosity of the Mesozoic dinosaur's life dioxide is very high, whereas the viscosity of the later Neozoic dioxide is rather low. Changes in air composition, is there a benefit with the extinction of dinosaurs?
A similar event can occur naturally in an appropriate environment, environmental changes can often occur fertility and decline of a species. When the environment is beneficial to the species, it will reproduce fertile; the opposite environment, can degenerate or even extinct.
By the end of 2016, scientists confirm a fossil discovered more than a decade ago actually contains a brain tissue that has become the first fossil fossil brain ever discovered. [1]
The fossil, most likely from a species closely related to Iguanodon, displays distinct similarities to the brains of modern-day crocodiles and birds. Meninges — the tough tissues surrounding the actual brain — as well as tiny capillaries and portions of adjacent cortical tissues have been preserved as mineralised ‘ghosts’. [2]
Pebble-colored rocky pebbles discovered more than a decade ago in Sussex, has been sampled as the first sample of dinosaur brain tissue fossils. The brain fossils are likely to belong to a species linked to Iguanodon, a large herbivorous dinosaur that lived in the Early Cretaceous Period, some 133 million years ago.
The 133-year-old brain fossil of a dinosaur species known as Iguanodon.
Supplied: Dr. David Wacey / University of Western Australia. The last year is a very memorable time for palaeontology.
[2]
The discovery of soft tissue fossils, especially the brain, is so rare that it is difficult for researchers to understand the evolutionary history of the network. The possibility of preserving the brain tissue is very small, because the discovery of this specimen is amazing.
This is very likely, if the dinosaur brain tissue is well preserved because it is trapped in a liquid environment with high acidity and low oxygen levels-like a swamp-shortly after death. This condition allows the mineralized soft tissue before it decomposes completely, so it can be well preserved. This dinosaur estimate died within or near the water body, and its head was partially immersed in the sedimentary layer at the bottom.
Since water contains only a little oxygen and is very acidic, the soft tissue of the brain is presumably preserved even before the whole body is immersed in the sediment layer.
The researchers investigated the fossilized tissue under a microscope and looked at what appeared to be blood vessels from the inside of the brain. Scientists also spent a year yesterday discovering the largest dinosaur footprint in the world, located in Western Australia and a new piece of information suggests that T.rex is not an overzealous dinosaur. [3]
According to one scientist, Dr. Alex Liu, a paleobiologist from the University of Cambridge, this brain tissue is very different from anything they've ever found. They did not expect to find such brain tissue in vertebrate animal fossils. [4]
The results of identification using electron microscopy scanning techniques show that the fossil structure of the brain and the special meninges (membrane system lining the central nervous system) have similarities with the brain of dinosaurs of the modern era, birds and crocodiles.
In certain reptiles, the brain is shaped like a sausage, surrounded by a dense area of blood vessels and a thin-walled or sinus vascular chamber that functions as a blood drainage system. The brain itself takes up only about half the cranial space.
By contrast, this fossil brain network appears to have been pressed and attached directly to the skull, increasing the likelihood that some dinosaurs have large brains that fill the skull cavity.
Thus, being unable to see the brain lobe, it can not be sure how big the brain of this dinosaur is. It is quite possible that the dinosaurs had bigger than expected brains, but we can not deduce them only from these specimens.
Reference
EndNote:
1. The latest scientific discoveries source
2. Fossilized dinosaur brainsource
3. The latest scientific discoveries source
4. The latest scientific discoveries source
5. The First Fossil of the Preserved Dinosaur Brain-source
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