A | From 2016 to 2019, scientists observed a group of macaques to see how they used stones as tools. The behavior of the primates was filmed.,Unexpectedly, the researchers discovered that the monkeys not only used stones as tools, but also as sex toys; they went on to publish their findings in a study.,It turned out that males and females of different age groups used stones to satisfy themselves, but there are differences between groups of macaques. As it turns out, female monkeys are more picky in choosing stones, while young males "played" with stones more often, and indiscriminately.,Some populations of macaques also regularly play with stones without sexual overtones. They wear them, rub surfaces with them and beat them against each other.,According to the study, this odd behavior can only be observed in certain groups of the animals.,The new study is based on previous work published in the journal Physiology & Behavior in 2020. Then researchers first proposed a hypothesis about the use of sex toys by male macaques, and now scientists have studied females, as well as studied the potential motivation of macaques of both sexes.。 北京时间8月22日，中国社会科学院考古研究所与秘鲁相关机构，在秘鲁苏佩，正式签署考古合作协议，将联合开展卡拉尔文明考古研究。 卡拉尔文明兴起于秘鲁北部海岸，年代从公元前3000年延续至公元前1800年左右，是美洲迄今发现的最早文明。这是中国考古机构首次正式进入南美洲开展联合考古工作。 (总台央视记者 艾达 张立雷) 【编辑:曲克】。
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