Hair and evolution 毛发和进化论_BBC_英语广播-查字典英语网

Because it meant that they were exposed to long hours of strong sun and they were in danger of overheating.

4. What is the advantage of having little hair in a hot climate?

It means that you can sweat efficiently.

5. What link does the author make between hunting meat and human success?

The author explains that eating meat provided energy that helped the brain to develop.

2. 请你在不参考课文的情况下完成下列练习。选择一个意思合适的单词填入句子的空格处。

1. I discovered the other day that I have a close relative living in Greenland. She's actually my first cousin.

2. Darwin explained his famous evolutionary theory of natural selection in 1859 in his book 'On the Origin of Species'.

3. If babies wear too many clothes in hot weather, they are at risk of overheating.

4. Daniel thrives on hard work.

5. Our human ancestors lost hair because this allowed them to sweat with the greatest efficiency.

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