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Cooking our food gives us a second stomach,
吃熟食让我们的身体之外
outside of our body.
有了第二个"胃"
Now we begin to digest the fats,
我们开始消化脂肪
the carbohydrates, the proteins
碳水化合物和蛋白质
before we chew the food,
之后再咀嚼食物
making it easier for us to digest it,
让其更容易被我们消化吸收
which means we get a smaller stomach,
也就是说 我们的胃小了
and therefore, a bigger brain.
与之相对的 我们的头脑发达了
Better nutrition boosts the human brain.
日益丰富的营养让人类的大脑飞速进化
Over 2 million years, it more than doubles in size,两百万年间 人类脑容量增加了一倍多
With trillions of connections.
它有着数以万亿的连接
The most complex structure in the universe,
是宇宙中最复杂的结构
Letting us think,
它让我们能够思考
Communicate
相互交流
And love.
彼此相爱
It could be argued that society,
我们可以说
any kind of society,
任何一个群落的存在
began with the cooking of meat over flame.
都是以用火烧熟食物开始的
But man is not always the hunter.
但是人类不总是猎手
Fire protects them from other predators,
火保护他们不受其他捕食者的攻击
But this couple will be lucky to live to 30.
这对夫妻能活到三十岁已是万幸
