Chimpanzees: who am I?

Chimpanzees: I is? www.thebeijingnews.com · 3-5, 2007-15: 25: 43 · Source: Beijing News

Scientists discover chimpanzees manufacturing tools, classical theory challenged illustrations/Xu Ying sword evolutionary theory tells us that man and apes and everything else in the world from a common ancestor. Historical materialism tells us that man and animals are differentiated, mark is the person who will use the tool. Believe that science of people believe that the person and the common ancestor orangutan responded to people where it came from big problem, but whether scientists, philosophers or ordinary people, has always been very curious people and orangutan, which is near or far? people and other animals what kind of relationship? recent paleontological territories two almost at the same time of the discovery to the curious adds quite a topic. Discover one of the chimpanzees in Africa Senegal could use branches make a spear, the caves of Plexus monkey drag out of the hunt, this behavior is almost similar to the original person's behavior. Found II is caused controversy in the human and chimpanzee the separation time, it overturned the original 500 million to 700 million years, and became more recent 400 years, in accordance with the discovery of human "age" has been reduced by at least 100 years. Found 1 Gorilla-tip "spear" to assassinate monkeys found under the first, is the first time observed chimps use tools to hunt mammals, this amazing discovery to early human predation behaviors evolution provides very good study material. Study published on 24 February in academic journals on the biology of today. In no less than 22 times by tracking video, scientists record the Senegal's wild chimpanzee tries to use a stick for "spear" into the cave, a "small" from the monkey small primates drag out to hunt. The core research team of anthropologists, United States, Iowa, by Jill pruetzon discovered that chimpanzees were spear into the caves, warts, sucking or licking their own tools, and then try again. Chimpanzees make "spear" technology of basic steps are as follows: find a stick, fold in half, with tooth at the ends of the breaks sharpened. In this way, it will come from monkeys to sleep in tree holes, stamp into "weapons", held out of game. According to the report, these "spear" average each about 50 cm long, diameter 11 mm wide. Researchers will this tool called "spear" instead of "throwing spear" because orangutans use stamp into the tree, instead of being thrown into it. "They are certainly very forcefully in Spurs game, in which case there is a pointed stick is certainly very useful, but I'm not sure whether the pointed tip to can pierce the animals. " Pruetz said. The "chimpanzees are whips his spear into, we suspect, as long as cavities inside has been from monkey, will have a stab. " He said. Found 2 "spear" of evidence is a little weak but this tool efficiency make people wonder. United States University of Southern California's primates zoologists Clegg Stanford says, "spear" (spear) argument is a bit exaggerated, sounds like a chimpanzee and feel very much like the early humans, he felt that the use of "big stick" (bludgeon) this word more precise point. Observation at 22, really results in only once. Researchers Paco · bertolani witnessed a chimpanzee success story. Comfortable, chimpanzees are the small clumps of monkey tear. Although he said that now also cannot tell how plex monkey in towed out when they are already dead, but observation, towed from clumps of monkeys not issued any sound, no sign of any attempt to escape, as researchers make assumptions, chimpanzees did use tools let game fight. Stanford, said the 22-the "spear" behavior observation records is "very good evidence", however, because only a gorilla handling records nor the spear what use Visual record, the evidence still seem a bit weak. Despite this, he still believed that the discovery is "amazing", had earlier reports found in Tanzania have female chimps use tools tree squirrels wakeup sleeping in, but other than that, so far there is no other evidence chimpanzees are using a weapon in the hunt. In fact, chimpanzees use tool has been a very common phenomenon. The 1960s are primates biologists discover chimpanzees with wooden sticks to the cave of termite took out. A recent study, February the United States National Academy of Sciences journal, there are also articles published archaeologists, they found in West African Ivory Coast 4300 years ago stone hammer, it may be that the use of chimpanzees hit open nuts. While chimpanzees hunting mammals ability has always existed, Stanford is also found in the 1990s are fiercely chimpanzee hands hunt Columbus monkeys. However, you will use the tools and the ability to hunt two simultaneously, this is the first time. "We've never found this idea chimpanzees progress cannot combine two capacities, with arms to assist in the hunt. " Stanford says. It found that there is an interesting place, which is the most used "spear" is the female young chimpanzees, this implies that, perhaps in the evolution of early human ancestors, the female in the tools used to play a role. "Observation of our closest relatives of the animal, see them and early human so similar to the way of life, can help researchers better understand the early human ancestors of ethology and ecology. " Pruetz said. Found 3 human and chimpanzee chimpanzees is separation more late closest human's "relatives", in another the latest scientific discoveries, the human race and the relationship between the "relatives". In the United States public library of science open access journals in genetics journals (PLoSGenetics), from Denmark and the United Kingdom's scientific team announced their adoption of new DNA testing in humans in the 400 million years ago and the separation of the chimpanzee, instead of the original thought of 500000 to 700 000 years. In human evolution, the scientist agreed in millions of years ago, humanity and blackOrangutan (chimpanzee) has a total of progenitor, then back millions of years, humans and gorillas (gorillas) and orangutan (orangutans) also have ancestors, but in specific age, in the event of a disagreement between the scientific community has. Prior to comparison of the dominant argument is about 500 million to 700 million years ago, man started and chimpanzee "separation". This study took the 100 million times faster. Research report: "assuming that humans and chimpanzees (orangutans) in 1800 years ago from ancestors there branch out, the human and Chimpanzee (chimpanzee) at 400 million years ago until around into different species. " This time, from Denmark, households, University and Oxford University scientists attach four similar species, humans, chimpanzees, gorillas and orangutans of DNA are compared. Their calculation methods "molecular clock" is very famous, it assumed that all DNA are to a certain rate variation, from the time period for millions of years, the rate is fairly stable, with little or very close to constants, as you would a clock to measure the length of time, so you can pass a biological DNA molecules of evolutionary rate to guess it appears or origin. Previously, scientists under the "molecular clock" theory, projecting humanity until 100 years ago will have a unique human characteristics, such as life growth, prolonged, sexual maturity in childhood than other species too late for many years, and so on. In fact, the 400 years "," data is not the first time. In May last year, the United States, MA, University of science and technology and the Department of Genetics at Harvard Medical School of scientists discovered the human potential in the 400 million years ago and the separation of the chimpanzees, but they last and final data back to 540 million years ago. In that study, they found that the separation of the two species, the ancestors of humans and the chimpanzee ancestors might have for a long time of hybridization. Genetic evidence shows that the chimpanzee is the closest to the human species, there is up to 96 per cent of DNA. Last year, from Georgia Tech University scientists found a chimpanzee and human genetic similarity degree more than its and gorillas and chimpanzees in common. Yellow wanbo: Marx classical theory also Yes Marx once said: "people and animals of the biggest difference is that one can use and manufacture of tools. " And when the chimps of Senegal, was found to use self-made" spear "to the assassination of Plexus monkey, it also holds? recall, in fact, not only chimpanzees, Animal Kingdom, many animals are able to use tools! birds are good examples. A place called "Red-tailed shrike" bird will rodents to wear in a thorn or a sting of rail network to make it easier to pull apart prey. In France of the Pyrenees mountains, white vultures will stone to crack an ostrich egg. There is also an OWL will collect animal wastes are placed in the nest around the lure beetle. Then, in the water, at the bottom of the sea of dolphins in search of food, with a nose with sponge, to protect their skin, or from small fish attacks. Otter will work closely with stone facing regardless of Spengler and hit go, until you open the belly. These are inevitably let people begin to doubt, people and animals do not distinguish between? but scientists said that Marx's assertion in the now, and there are no errors. "Using tools and manufacturing tools are two concepts. " Chinese Academy of Sciences researcher at the Institute of ancient vertebrates wanbo Wong. "Using tools will not only chimpanzees, many animals, but manufacturing tools are not generally available to the animals, it needs to have a certain thinking for a long time. " He cites an example shows how to produce manufacturing tools for thought:" a long walk in the mountains a chimpanzee, suddenly a sharp stone stumbled, were cut and bleeding,was cut after it has been repeatedly found sharp stones to cut leather, so it began to grope. On the one hand, it may be looking for sharp stones, and slowly discover the sharp stone not only cut your own skin, cut the skin of other animals, on the other hand it may themselves be started grinding stone, and finally create a sharp stones. "This time Senegal chimpanzees use" spear "discovery, yellow wanbo represents also a follow-up study. " Manufacturing tools to see what tools, is a natural stick, or put some thatched volume up into a spear, or other ways, this is still unknown. Only when these chimpanzees did later found to be very complicated tools, then this theory will be challenged. "Why are you a little history of evolution--is the first you belong to the Animal Kingdom. Of course if you have a chlorophyll, you should put in the plant Kingdom. Then you belong to a class of vertebrates, when you were born with chordoma by, and you are in this category. When you grow, the chordoma became the spine, you are placed in the door in vertebrates. Your hand is hot, you're not a cold-blooded animals that you belong to Mammalia. If you are female, you will be having a baby. you should still have a placenta, therefore you are mammals in true animal Asia-key. Following a tell is simple. You have ten fingers and 10 toes, with nails, you became Primate eye (Primata). Your two eyes in front of the head on it, rather like a monkey long on both sides that you belong to the apes Heteroptera. Now look, do you use two legs? if so, then you enter the University family. People, there are other communities, such as "straight man", but unfortunately also extinct, but you may belong to an existing one, that is, unwise person, this is the minimum human classification layers: species. You and all of us, sapiens, modern people, people. Compilation/reporter Kim Yu