And the answer is--And why would--

答案是然后你为什么
why are there so few people afraid of guns,

为什么很少人害怕枪支
cars, and electrical outlets?

汽车或者电源插座
The answer is not particularly surprising.

答案并不是特别令人惊奇
These are things that--something's ticking over there.

这些东西是那边有东西在动
These are things that are scary in our ancestral environment.

这些是我们祖先的环境里特别可怕的东西
More particularly,

更准确的说
these are things that through the course of human evolution

这些东西在人类的进化史上
have been dangerous to us.

曾经威胁过我们
And so, we are afraid of these things

然后我们就对这些东西害怕
and not so afraid of these things ;

而不害怕这些东西
similarly for nonhuman primates.

非人类的灵长类动物也一样