Paleontologists have discovered that only after the death of the dinosaurs early mammals began carefully to learn day way of life, according to the online edition of Naked Science.
It is considered that the common ancestors of all mammals has long been nocturnal, which dramatically constrained their development. Paleontologist, Professor at University College London Kate Jones and her colleagues found, when our distant predecessors began to get out into the sunlight.
In an article published by the journal Nature Ecology & Evolution, scientists report the results of studies 2 thousand 415 species of modern mammals. For each analyzed data on the behavior and modeling the probable lifestyles of their ancestors. This allowed to conclude that the transition to daily existence lasted millions of years, and reached a peak during the extinction of the dinosaurs.
“We were extremely surprised by such close coincidence between the disappearance of the dinosaurs and the beginning of the daily activity of mammals, says one of the authors Roy Maor, but we are not saying a word, came to the same result using different, alternative approaches to analysis.”
One of the first (between 33 and 52 million years ago) this step did the ancestors of primates, specifically monkeys, which by this time already separated from some relatives, such as lemurs or Lori. This may explain the fact that in this group of mammals is the adaptation of vision to daily lifestyle to get the maximum development. Ability to distinguish colors, we are not worse than birds and other animals, who never left day way of life.
It is assumed that the early ancestors of mammals nocturnal helped to avoid competition with reptiles of the Mesozoic, the era of their heyday, however, he was subsequently arrested development until there has been a qualitative leap. “We cannot say that the extinction of the dinosaurs led to the development of daily activity in mammals – adds Kate Jones. But in our results we see a clear correlation”.
Earlier it was reported that biologists have found stem cells, thanks to which lizards and salamanders can regrow a lost tail, and sometimes other limbs. Such studies are conducted in order in order to understand how to stimulate recovery processes in the human body that has no ability to grow a lost arm or leg, finger, or spinal cord injury.