This is one of the conclusions from a comprehensive study that lasted six years that studied the lineage of placental mammals - the largest group of mammals alive today and of course also includes humans
Recently, a comprehensive six-year study came to an end that sought to provide the most comprehensive picture of ovulation in the placental mammals, the group that also includes humans. Placental mammals are the largest branch of the mammalian family tree and contain more than 5,100 species alive today, say researchers from the Carnegie Museum of Natural History, one of 23 groups that took part in this massive interdisciplinary effort that used DNA comparisons as well as morphological and anatomical data on the trunk an unprecedented measure. By comparing two types of data, the scientists restored to an unprecedented level of detail, the family tree of the cetacean mammals. This study included features of the anatomy of both living mammals and extinct placental mammals. "In the field of mammal research, there was a division between people who worked with DNA and others who worked on morphological characteristics" explains Dr. John Wible, curator of the field of mammals at the Carnegie Museum and one of the partners in the article. "They just haven't worked together so far." It's not that there haven't been shared databases of morphology and DNA until now, says Dr. Michelle Spaulding, a postdoctoral fellow at the Carnegie Museum of Natural History. "This time we reached a phenomenal amount of morphological data in relation to the amount of DNA information compared to typical studies in the field." End of the debate: the placental mammals appeared only after the disaster that caused the disappearance of the dinosaurs "We focused the research around the time of the border between the Cretaceous era and the Triassic era - 65 million years ago," says Spaulding. The molecular and morphological studies differ in defining the age at which the placental mammals first appeared. The molecular studies focus on the middle of the Cretaceous, when dinosaurs still ruled the world. On the other hand, the morphological studies never found evidence of fossils of marsupials from that long period of time, and instead placed the origin of marsupials after the mass extinction at the end of the Cretaceous era - the event that ended the dominance of the dinosaurs. "Our important goal was to settle this debate once and for all, and the results show that the marsupials appeared after the boundary in question, and this means that the mass extinction was a critical event in the evolution of mammals. A dedicated website for the project The research was done using the web application Morrowbank . The matrix is freely available and provides a roadmap to the tree of life, and you can see how team members characterized each of the more than 4,500 features in the dataset, including images of the featured features. "The website allowed the team members, who were scattered all over the world, to work simultaneously." Spaulding said. Image to the notice of the researchers
9 תגובות
My father, they worked on you (lol…..)
Danit (the chatterbox) invented meaningless words that don't exist at all
These are not scientific words like supercalifragileisticexpialidochess only exists in movies with Nanny who knows how to fly
Signed
Yerhatziel Prostoshistorskovich Jr. (the son)
Danish, using scientific words to say pseudo-scientific things is a literary art, but not a scientific one
Abby - how can you say that?
It is known that the kangaroo is a development from a non-lactating ancestor whose lactating pouch developed after an isolated species encounter in Australia over the years between tradrochtological animals and regulorotube amphibians.
What is complicated about this and what is the connection between this and the article????
They were probably similar to the non-chilling mammals, of which the kangaroo on the one hand and the duck on the other have survived to this day.
"The oldest placental mammals, lived immediately after the end of the dinosaur period".
It is not clear to me: after all, mammals in different variations existed before, and even some of them, it turns out, were not small at all.
So weren't these mammals pelicans?
And in general the subject of the placenta as far as I know is a later addition and mammals such as the duck (egg layers) were the main evolutionary branch of mammals.
This is an example of an article that was published here:
"Chinese farmers discovered the bones of two large mammals from the Mesozoic era. The remains of a small dinosaur were found in the stomach of one of them. Until now it was believed that the mammals of that time were mice that fed on insects"
https://www.hayadan.org.il/%D7%A0%D7%AA%D7%92%D7%9C%D7%95-%D7%99%D7%95%D7%A0%D7%A7%D7%99%D7%9D-%D7%A7%D7%93%D7%9E%D7%95%D7%A0%D7%99%D7%9D-%D7%A9%D7%90%D7%9B%D7%9C%D7%95-%D7%93%D7%99%D7%A0%D7%95%D7%96%D7%90%D7%95%D7%A8%D7%99/
withering,
The very fact that you are shocked by Alon's reaction, feel pity for those born with Treacher Collins syndrome, feel compassion and love without a doubt - all this shows that there is something beyond the material, something spiritual in you.
And what is this spiritual? Is it related to God? What additional physical dimensions? Does it exist in every living creature? Does it also exist in plants and still life?
I don't know, but there is something more than meets the eye.
And on the other hand, one should not fall into the equation that if there is spirituality, then one should observe mitzvot, etc., etc.
I don't understand Camila why you bother responding to the clown
oak,
How is your response related to the topic of the article?
Honestly, if your child was born with Treacher Collins Syndrome
http://en.wikipedia.org/wiki/Treacher_Collins_Syndrome
Would you have thanked God for the gift even then?
Do you think that those unlucky people with this syndrome (and a number of other syndromes), most of whom have a poor quality of life and some of whom live lives full of indescribable suffering, feel the gratitude you express here? And if most of them answer that they don't share your worldview (which is crazy in my eyes), do you think it's because they are ungrateful or just subhumans who are unable to spell at the heights you are at? And for what noble purpose of your pet creator do you think such suffering is required of human beings whose sins are all born with a genetic defect that was not detected in time? Is it because it is their correction for their sins in the previous flick-flack as claimed by some psychopath who is also, unsurprisingly, one of the most popular religious leaders of Judaism today?
There are many more questions that a person should ask about the unnecessary things you wrote, which do not indicate wisdom nor sensitivity towards others. If you didn't like this comment, please do everyone a favor and think twice before you flaunt your stupidity.
By the way, do we really need to remind you that Lapid, who is not really in love with religious people, received many more mandates than any of the religious parties? What does this say about your creator? Could it be that he is hinting to you and your ilk that maybe you should stop sowing hatred in the people through your fake "free love" that is always somehow spiced up with religious coercion, social parasitism and shocking and hypocritical morality? Is this not an option that comes to your mind?
And thanks to the Creator of the world who created all the creatures and all the human beings each according to their part and made a great and beautiful and right and true world.
And thanks to the Creator of the world who blessed us with wonderful sights and a wonderful world and wonderful knowledge.
And thank the Creator of the world that anti-Semitic parties that hate religion and the Jews do not pass the blocking percentage, while all the religious parties receive 11 + 12 + 7 mandates, may his name be praised forever!!!