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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 message was not authentic, with the real Zelenskiy soon denying the claim on his official Telegram channel, but the incident highlighted a major problem: disinformation quickly spreads unchecked on the encrypted app. At the start of 2018, the company attempted to launch an Initial Coin Offering (ICO) which would enable it to enable payments (and earn the cash that comes from doing so). The initial signals were promising, especially given Telegram’s user base is already fairly crypto-savvy. It raised an initial tranche of cash – worth more than a billion dollars – to help develop the coin before opening sales to the public. Unfortunately, third-party sales of coins bought in those initial fundraising rounds raised the ire of the SEC, which brought the hammer down on the whole operation. In 2020, officials ordered Telegram to pay a fine of $18.5 million and hand back much of the cash that it had raised. "We as Ukrainians believe that the truth is on our side, whether it's truth that you're proclaiming about the war and everything else, why would you want to hide it?," he said. The fake Zelenskiy account reached 20,000 followers on Telegram before it was shut down, a remedial action that experts say is all too rare. "And that set off kind of a battle royale for control of the platform that Durov eventually lost," said Nathalie Maréchal of the Washington advocacy group Ranking Digital Rights.
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