評(píng)論
打印
So we have cooking and we have small guts.
正是因?yàn)榕腼兗夹g(shù) 人類才有了小腸道
This freed up energy for us to develop
這些多余的能量
what is arguably the most important organ in our body...
使我們身體最重要的一個(gè)器官 得以發(fā)展
the organ which, many would say, makes us human.
普遍認(rèn)為 正是這一器官的發(fā)展造就了人類
Our brain.
那就是我們的大腦
The small gut big brain theory was developed
小胃大腦理論是由
by paleoanthropologist Professor Peter Wheeler.
古人類學(xué)教授彼得·韋勒提出的
We think that the smaller digestive system
我們認(rèn)為 正是食物的轉(zhuǎn)變
in Homo erectus was able to evolve because of the shift in diet,
使直立人的消化系統(tǒng)得以進(jìn)化
freed up energy which could be used to power a larger brain.
這些多余的能量可以增強(qiáng)我們的腦力
And this is what we see,
我們可以看到
the increase in brain size in Homo erectus
直立人腸胃變小的同時(shí)
mirroring the reduction in the size of its gut.
腦部也開始變大
And it certainly does take a lot of energy to power our brains.
要增強(qiáng)我們的腦力 肯定得消耗很多能量
Although only 2.5% of our body weight,
盡管大腦重量只占體重的2.5%
when we're sitting, our brain consumes 20% of our energy.
即使坐著不動(dòng) 腦部也會(huì)消耗我們20%的能量
