... Why are our ancestors 为什么我们的祖先 always kings and queens 都需要是国王和王后 and never the common people? 而从来不是普通的人？ ...
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The only puzzle, given how incredibly wealthy we are by the standards of our ancestors, is why more people don't opt for the extra time instead of the extra money.
以前辈的标准衡量，我们现在极为富有。有鉴于此，唯一令人困惑的问题是，为何更多人不会选择更多休闲，而是选择去赚更多的钱。
Have you ever played with a dog or cat and wondered why they are so tame?How did our ancient ancestors take wild, and potentially danger…
我们的祖先又是如何驯化它们的呢?今天，就让我们一起听听研究人员是怎样驯化狐狸的吧。
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