Beijing, August (Xinhua News Agency) 1 (August) German and American researchers found that, compared with other primitive humans, the species of modern humans, the Homo sapiens, are particularly capable of adapting to a variety of ecological environments, including some fairly harsh environments. Super strong "ecological plasticity" may be the reason why Homo sapiens can survive and develop so far.
The Marx Planck Institute of human history, Germany, published a news bulletin that the researchers and the University of Michigan, the United States, used paleoanthropology and paleoenvironmental data to analyze the spread of Homo sapiens from 300 thousand to 12 thousand years ago and compared with other primitive humans before and in the same period. The above conclusions are obtained.
After the human ancestor 's "division" with chimpanzee, many branches had been developed in the evolution of millions of years, but the other branches were extinct, only the one of the Homo sapiens was saved. The new research suggests that the Homo sapiens occupy a new unique niche, that is, "almighty specialties", not only to adapt to different environments, but also to develop specific adaptations for each environment.
In ecology, animals living and eating narrow food in a specific environment are "specialized". They are more competitive in the familiar environment, but they are easily extinct when they encounter environmental changes; in contrast, they are "Almighty". These animals have strong tolerance to environmental changes, but they are positive with "specialized" animals. It's harder to compete.
Other primitive humans are biased toward "specialized", such as the erectus adapted to the environment of the interlaced forest and grassland, and the Flores live in the humid climate of Southeast Asia.
Researchers say that Homo sapiens possess both the characteristics of "versatile" and "expert". From 80 thousand years ago to 50 thousand years ago, the Homo sapiens spread to other high altitudes that were untouched by other primitive humans, at least 45 thousand years ago, at least a variety of environmental areas in Asia, the Americas and the southwestern Pacific Islands, including tropical rainforests, deserts, highlands and Arctic regions, were highly suitable for various environments. Yes.
In addition, extensive cooperation among non Homo sapiens within the Homo sapiens group may further enhance the ecological plasticity. Researchers hope to further explore the spread of the Homo sapiens in the African continent, and look for more evidence in the past neglected areas of the Gobi desert and the Amazon rainforest. (finish)
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