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人类远古近亲在 150 万年前相遇

2024-12-02 15:28 by 布兰尼肯夫人

大约 150 万年前,两个古老的物种在肯尼亚的一个湖边相遇。他们在泥里的脚印被时间冻结,直到 2021 年才被发现。对这些印痕的分析表明,它们属于直立人,现代人类的祖先,以及更远的近亲波伊塞傍人。两人在几小时或几天内穿过了湖区,留下了不同古人类物种在同一地方共存的第一个直接记录。脚印保存了这些人的细节,包括足弓的高度、脚趾的形状和行走方式。利用基于 3D X 射线的成像技术,研究人员研究了脚的运动是如何塑造它留下的痕迹的。他们将古人类脚印的足弓深度和脚趾角度与人类脚印进行了比较。分析表明,这些孤立的脚印属于直立人个体,直立人被认为是第一个像现代人一样直立行走和奔跑的人类物种。这一物种的脚比较平,大脚趾的位置也在不断变化。与人类的大脚趾相比,它们的大脚趾的活动范围更大,右脚可以向外倾斜 19 度,左脚可以向外倾斜近 16 度,而人类的大脚趾向外伸展约 10 度。

https://www.science.org/doi/10.1126/science.ado5275
https://www.ebiotrade.com/newsf/2024-11/20241129074700480.htm

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人类远古近亲在 150 万年前相遇

2024-12-02 15:28 by 布兰尼肯夫人

大约 150 万年前,两个古老的物种在肯尼亚的一个湖边相遇。他们在泥里的脚印被时间冻结,直到 2021 年才被发现。对这些印痕的分析表明,它们属于直立人,现代人类的祖先,以及更远的近亲波伊塞傍人。两人在几小时或几天内穿过了湖区,留下了不同古人类物种在同一地方共存的第一个直接记录。脚印保存了这些人的细节,包括足弓的高度、脚趾的形状和行走方式。利用基于 3D X 射线的成像技术,研究人员研究了脚的运动是如何塑造它留下的痕迹的。他们将古人类脚印的足弓深度和脚趾角度与人类脚印进行了比较。分析表明,这些孤立的脚印属于直立人个体,直立人被认为是第一个像现代人一样直立行走和奔跑的人类物种。这一物种的脚比较平,大脚趾的位置也在不断变化。与人类的大脚趾相比,它们的大脚趾的活动范围更大,右脚可以向外倾斜 19 度,左脚可以向外倾斜近 16 度,而人类的大脚趾向外伸展约 10 度。

https://www.science.org/doi/10.1126/science.ado5275
https://www.ebiotrade.com/newsf/2024-11/20241129074700480.htm

#科学

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The regulator said it had received information that messages containing stock tips and other investment advice with respect to selected listed companies are being widely circulated through websites and social media platforms such as Telegram, Facebook, WhatsApp and Instagram. Pavel Durov, Telegram's CEO, is known as "the Russian Mark Zuckerberg," for co-founding VKontakte, which is Russian for "in touch," a Facebook imitator that became the country's most popular social networking site. The last couple days have exemplified that uncertainty. On Thursday, news emerged that talks in Turkey between the Russia and Ukraine yielded no positive result. But on Friday, Reuters reported that Russian President Vladimir Putin said there had been some “positive shifts” in talks between the two sides. Since January 2022, the SC has received a total of 47 complaints and enquiries on illegal investment schemes promoted through Telegram. These fraudulent schemes offer non-existent investment opportunities, promising very attractive and risk-free returns within a short span of time. They commonly offer unrealistic returns of as high as 1,000% within 24 hours or even within a few hours. Either way, Durov says that he withdrew his resignation but that he was ousted from his company anyway. Subsequently, control of the company was reportedly handed to oligarchs Alisher Usmanov and Igor Sechin, both allegedly close associates of Russian leader Vladimir Putin.
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