中国品味生活网:品味生活 > 生活 > 体育 > 正文

新科学家出版的《质疑万物》解释的7个生活常识

http://www.cn82.cn时间:2014-11-06 18:54来源:未知

  导语:日常生活中有很多事儿,我们都习以为常,但是太阳为什么是黄色的,人类为什么要用厕纸,人类为什么有5个脚趾而不是更多。新科学家出版的《质疑万物》(Question Everything)为我们解答了这些问题。



  


  太阳为什么是黄色的


  1、If the sun is a star like all the others, why does it appear yellow rather than white?


  既然太阳也是恒星,为什么它是黄色而不是白色?


  Contrary to popular belief stars come in many different colours. This is because their colour is intrinsically linked to their temperature. Young, hot stars will be white, while cooler, older stars will be red. Our sun is a medium-sized star burning at a medium rate. This is reflected in its yellow colour。


  关于恒星的颜色,流行的说法是它们本身就有很多颜色。然而事实却与之相反,恒星的颜色本质上与它们的温度有关。高温的恒星会呈现出白色,温度低点的年老的恒星会呈现红色。而我们的太阳是一个以中等速度燃烧的中等大小的恒星,处于中间阶段,所以它是黄色的。


  


  为什么人类需要厕纸


  2、Why don’t animals need toilet paper?


  为什么其他动物不需要厕纸?


  Although we share most of our DNA with the great apes there are some striking anatomical differences, most notably our vertical posture. We can walk tall with our hands free – but evacuating waste is more difficult. The area where we eject our urine and faeces is compressed between the thighs and buttocks so we are more likely to soil ourselves. And unlike other animals, we feel disgust about our own waste. This seems to have developed from living in settlements together rather than roaming in forests where we could leave our mess behind。


  尽管我们大部分的DNA都与类人猿相似,但在身体结构方面,我们还是有很大的差别的,尤其我们是直立行走的。尽管直立行走解放了我们的双手,但是这样却不利于排泄。当我们排泄时,挤压的部位处于大腿和臀部之间,很容易弄脏自己。而与其他动物不同,我们对于自己的排泄物会感到恶心。这或许与我们选择定居有关,我们无法像其他动物那样在树林里到处游荡,随意排泄。


  3、Why are eyelids different shapes in different races?


  为什么不同种族的人,眼皮的形状不一样?


  It’s evolution. Some say the epicanthic fold that causes almond-shaped eyes in east and central Asian populations evolved to protect the eye from extreme weather conditions or high levels of ultra-violet light。


  这跟人类的进化有关。有的人认为中亚和东亚人种的杏仁眼是由眼褶造成的,这样可以保护他们眼睛以应付极端天气或者高强度紫外线。


  It is thought the fold also protects the eye from bitterly cold winds such as those blowing across Siberia. And it makes it easier to narrow the eyes so the eyelashes trap warmer air near the cornea and reduce the intensity of light reflected off snow。


  同时,他们也认为眼褶也可以帮助抵挡来自西伯利亚的刺骨寒风。杏仁眼更方便我们随时眯上眼,因而睫毛可以保持眼膜周边的温度,以此来减少雪光反射的强度。


【免责声明】本文仅代表作者个人观点,与中国品味生活网无关。其原创性以及文中陈述文字和内容未经本站证实,对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。您若对该稿件内容有任何疑问或质疑,请联系本网将迅速给您回应并做处理。