Today's rich bird diversity comes from only a few birds that survive the cavities that destroyed dinosaurs. However, scientists believe that before the start of massive extinction, ancient poultry varieties are already as large as modern varieties. Furthermore, the new research suggests that the now cured cousins of the birds are more elaborate, which are equipped with concrete biological cars.
According to exaggerated geological evidence, the asteroid reached about 10 km ago 65 million years ago. Furthermore, debris in the atmosphere will be cooled by the sun, which has strictly changed the global climate for many years, causing about 75% of the existence of the existence of the period. This included dinosaurs of all species, but also birds. Some scientists believe that every living bird can be found on their roots only for a few surviving ancestors – perhaps smaller landowners, such as insects, according to one study.
We know little of Aviv's life before mass extinction, from some fossils like Archaeopterx, whose panopic feather and skeleton sculpture is sandwiched. The pattern of similar pancake preservation is seen by most of the group called the endantrine – the most abundant and varied bird group of prehistoric periods. Almost all of the enantiensinhins captured the teeth and wings of the fingers, but all the other like the modern birds. Now researchers have discovered the fossils of the first immigrants that are protected in three dimensions, which represent unprecedented vision of an avant-garde group in the anatomy.
75 million years old fossils belong to newly described species Mirarce eatoni ("Mirarce" is Latin "wonderful", homage detailed maintenance of minerals, while Arce refers to a mythical winged messenger titans). Almost a complete skeleton – not just the head – was originally found in 1992, from the stern evil of the formation of Kiparovites, the Grand Gate-Escalata National Monument in Garfield, Utah. However, it was not until 2009 that Jesse Aeroolholt, a doctor of the University of California, Berklis, asked to study the fossils.
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Atlehole assembled Howard Hutchinson, a paleontologist who first discovered fossil and an expert in Enidornorne Jingmie O'Connor Mirarce eatoni A new study published in the journal PeerJ. It is worth noting that the enantyrinins, despite the fact that a completely different line of modern birds was formed, were the same adaptations for the extended flight – at least in the late Cretaceous.
The conclusion is based on the finding of cubic stones that support underneath threads. In modern birds, umbrellas are woven to the nails in order to maintain active flight. MirarceIt is deeper than other types of enantiortarine species, which means larger flight muscles. Finally, I wish that the energy at the bottom of the nail is stored in the nail stroke, which forms the V-shaped, as well as modern birds, unlike the previous birds and dinosaurs. All these features suggest that these indicators of the energetic birds were very strong flier.
"Our main challenge was to compare anatomy Mirarce Other late cretates with antitrust, because most of the bones are only one or two feet, and the majority of bones are bones, "Astorol told ZME Science." I remember how cool it was when I saw we had a axis (second neck veterin). Also, ulna on the big bones of the bone, and they realize that they were cubes (during the flight of feathers) for the first time enantiornithine was big "Aha!" Moment, "he added.
It is noteworthy that the enantiouns, although unlike modern birds, have developed the same properties that are adapted to the active flight.
"For me, the most interesting part of this study that I would like to share with this story is how an enormous flight of modern flight from modern birds to the adaptation (narrow and narrow sounds and wafers) says he is such a cool evolutionary story!"
But if they were so successful, why did they overwhelm them? The leading hypothesis is that the enantiomines that are climbed and perched trees have remained without a habitat after the asteroid impacted the forests around the world. The bird's ancestors, on the other hand, also included birds on the ground, who were able to survive.
"There is a growing evidence that wild forests that have been caused by the Chipuluppu crater have been destroyed by the massive amount of forest masses and we think that many immigrants live in. Many seem to have a live adaptation of trees, on the other hand, many modern birds of survival were water or landlines" , – told Atterolt.
In the future, the researchers plan to study bird ecrophophysics to make sure that it was perching, climbing or predatory.
"And I think it's critical to recognize that this is one of the thousands of fossil fossils found in the Escalante of Spain, and it's a fossil that is at risk of damage and theft and if the size of the park is reduced, it's a strong reminder, That we need to fight to protect our natural resources, "Atterholt concluded.
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