成都治疗静脉曲张用多少钱(成都哪儿医睾丸精索静脉曲张好) (今日更新中)

Neanderthals may not have been that different from us, after all.New evidence reveals that they created the world's oldest known cave paintings and even wore seashells as body ornaments. Both behaviors suggest that they thought symbolically and had an artistic sensibility like modern humans. Two studies published Thursday in the journal Science detail the latest findings."Undoubtedly it is showing that Neanderthals were thinking and behaving just like modern humans," Alistair Pike, co-author of the studies and professor of archaeological sciences at the University of Southampton, wrote in an email."We should no longer think of them as a different species, just humans in different places," he said.The new findings of symbolic thinking show that Neanderthals and modern humans were cognitively indistinguishable, the researchers said.Cave paintings and artifacts like painted seashells have long been regarded as the work of early modern humans, who were thought to have more advanced cognitive abilities than Neanderthals. Dating cave paintings can be a difficult process, and unreliable techniques never allowed for the possibility that these could be the work of Neanderthals.Until now, that is. A new technique called Uranium-Thorium dating is less destructive, is more accurate and can go back further in time than other methods. U-Th dating looks at the deposits of carbonate on top of the paint, which contain traces of uranium and thorium that indicate when those deposits formed. That allows the researchers to determine an age for what's under the deposits.The researchers applied this technique to paintings in the La Pasiega, Maltravieso and Ardales caves in Spain, which had never received "robust" dating. The paintings include red and black images of animals, dots, lines, disks and other geometric signs. There also are engravings, hand prints and hand stencils.Those hand stencils are particularly significant, and not just because they represent the hand size of a Neanderthal."A red line, a red dot or even a positive hand print could potentially be made 'accidentally,' " wrote Dirk Hoffmann, lead author of the studies and archaeologist with the Max Planck Institute for Evolutionary Anthropology, in an email."Of course, I am sure that this is not the case, since you would still need to bring [in] light and pigment, but one could argue that all you need is some pigment on your hand when you lean against a wall. A hand stencil cannot be explained like that. You have to hold your hand against the wall and the deliberately spray pigment over this. This is why we emphasize the hand stencil."The dating revealed that the cave art was created more than 64,000 years ago -- 20,000 years before modern humans appeared in what is now considered Europe.The shells were found in the Cueva de los Aviones, a sea cave in southeastern Spain. They are unique because they are perforated with holes and colored with red and yellow pigment. Others served as containers for the mineral pigments themselves. The pigments were used on the shells but could have also been used for the cave paintings and even as body paint.The deposit layer containing the shells dated to 115,000 years ago, which is even older than other shells recovered in Africa that were dated to modern humans."The standard archaeological interpretation of such finds is that they are body ornaments," Hoffmann said. "Similar finds were made in Africa or the Levant with similar age. In Africa or the Levant, these were made by modern humans, in Spain Neanderthals made them. So in terms of symbolism, early modern humans and Neanderthals were similar."The researchers are absolutely confident in their dating technique."We have spent 10 years refining the technique and have numerous quality controls," Pike said. "The dates respect the growth axis of the deposits we are dating, the oldest closest to the painting, the youngest at the surface."Once modern humans left Africa and migrated to Europe and other areas, mixing with the Neanderthals would've been inevitable. The researchers believe that the Neanderthals created this artwork on their own, without being influenced by any other population. But it's possible that they exchanged symbolism or that Neanderthals influenced the art and symbolism of modern humans. Modern humans were capable of symbolic behavior, so it "turns the who's copying who debate on its head," Pike said."The idea that culture only evolved with modern humans no longer makes sense," Pike said. Hoffmann suggested that Neanderthals now be referred to as "very close cousins" of modern humans.Is it possible that anyone else may have created the cave paintings?Pike said it is incredibly doubtful that a population of early modern humans migrated to Europe so early without any other evidence to suggest it."We cannot of course rule out that pre-Neanderthal populations made the art," Pike said. "This sounds like a project for the future."Hoffmann, Pike and their colleagues want to use their new dating technique in more caves in Spain, as well as France and Italy -- and anywhere else Neanderthals are known to lived.The findings also raise new questions for researchers."How far back does symbolic behavior go? Can it be traced to the last common ancestor of modern humans and Neanderthals? This is perhaps where we should be looking," Pike said. 5398

MONTEREY, Calif. (KGTV) - A student was stabbed in the chest by another student Monday at North Monterey County Middle School, the Monterey County Sheriff’s Department said.The attack happened in the quad of the Castroville school about 8:30 a.m., just before classes started, investigators said.The victim and the attacker are both 12 years old, said Deputy Joseph Banuelos. One of the boys stabbed the other with a six-inch kitchen knife, according to the deputy.A staff member approached the attacker and distracted him while another staff member came up behind the boy and tackled him.When deputies arrived, they arrested the attacker, who was sitting in the principal’s office.The school was locked down for an hour while a medical helicopter arrived to take the victim to a San Jose trauma center.The victim’s injuries are life threatening, Banuelos said.  880

My official statement on the presidential election: pic.twitter.com/F6AoS8lfhG— Governor Phil Scott (@GovPhilScott) November 7, 2020 140

NASHVILLE, Tenn. (AP) — Grammy-winning country group Lady A has filed a lawsuit against a Black singer who has been performing as Lady A as well. The group dropped the word "Antebellum" from their name because of its ties to slavery. But blues singer Anita White, who has been releasing and performing music under that name for years, complained publicly that the band never reached out to her. Negotiations between the parties broke down. The lawsuit seeks the court to declare that the band's use of the trademark "Lady A" does not infringe on White's alleged trademark rights of the same name. The band is not seeking monetary damages. 646

More than two dozen children in Virginia who had been reported missing are now recovered.The U.S. Marshals released a statement Monday morning stating their five-day effort called “Operation Find Our Children” resulted in the recovery of 27 children who had been previously missing in Virginia. They also located an additional six children who had been reported missing but were discovered with their legal guardians.More than 60 law enforcement officers from federal agencies, state and local regions participated in the effort. They were joined by 50 employees from social services, a team of medical professionals and representatives from the National Center for Missing and Exploited Children.Details about the children who were recovered, including when they were reported missing and where they were found, were not immediately available.This recovery effort is the latest from the U.S. Marshals. In September, a similar group of federal, state and local officers recovered 35 previously reported missing children in Ohio. And in Indiana, 8 kids were recovered in a similar missing kid law enforcement effort. 1123

来源：资阳报