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Are we becoming more stupid?

A 3D image replica of a 28,000-year-old skull found in France shows it was 20 per cent larger than ours.
A 3D image replica of a 28,000-year-old skull found in France shows it was 20 per cent larger than ours.


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It's not something we'd like to admit, but it seems the human race may actually be becoming increasingly dumb.

Man's brain has been gradually shrinking over the last 20,000 years, according to a new report.

This decrease in size follows two million years during which the human cranium steadily grew in size, and it's happened all over the world, to both sexes and every race. ...

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研究證明:人類可能正在變得越來(lái)越笨

???????盡管我們不愿意承認(rèn),但研究證明,人類可能正在變得越來(lái)越笨。

???????一項(xiàng)最新研究顯示,人類的大腦在過(guò)去的2萬(wàn)年間正在不斷萎縮。并且,這種萎縮在所有人種、不同性別中都有體現(xiàn)。

???????研究者凱瑟琳?麥考里夫在《發(fā)現(xiàn)》雜志上撰文稱:在過(guò)去的2萬(wàn)年里,男性的平均腦容量從1500立方厘米縮小至1350立方厘米。減少的大腦體積足有一個(gè)網(wǎng)球那么大。并且,女性的腦容量也在以同樣的比例縮小。

???????不過(guò),對(duì)于這種說(shuō)法,也有科學(xué)家表示了不同意見(jiàn)。來(lái)自美國(guó)威斯康星州的人類學(xué)家約翰?霍克斯教授就認(rèn)為,腦容量的縮小并不意味著人類智慧的下降。

???????也有一些古生物學(xué)者支持霍克斯教授的觀點(diǎn)。他們認(rèn)為,人類的腦容量雖然在縮小,但大腦的效率正在不斷提高。

???????另外,對(duì)于人類腦容量的萎縮,有學(xué)者認(rèn)為,這是人類繁衍發(fā)展的正?,F(xiàn)象。隨著人類生存環(huán)境的不斷改善,食物獲取和咀嚼的費(fèi)力程度越來(lái)越低,大腦也就減緩了生長(zhǎng)。

???????不過(guò),也有科學(xué)家認(rèn)為,人類的大腦可能重新發(fā)育,重新增長(zhǎng)。

???????對(duì)此,科學(xué)家們還在進(jìn)行更深入地研究。

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