日期:2009-03-27 在遗传中,基因会发生改变甚至突变,这是我们都知道的。可最近冰岛一家研究中心指出,在人的一生中,年龄的增长,环境的变化,营养的变化也会导致基因发生改变。 Individual human genomes change throughout a person's life influenced by environmental or nutritio... 阅读全文>>

日期:2009-03-27 夏天到了,各类防晒产品都争相登?>菟涤幸豢頢PF70的防晒霜在国外面世了,那是不是说我们涂了这个防晒霜以后就可以尽情地在太阳底下活动了呢?这个SPF到底代表什么呢?真的是SPF值越高,防晒时间就越久吗? This summer, sunscreens with SPF 70 hit the market. The... 阅读全文>>

日期:2009-03-22 同性恋现象一直是一个让人迷惑不解的问题。最近,瑞典研究人员发现,男同性恋者和女异性恋者的大脑存在某些相似性,女同性恋者和男异性恋者的大脑也具有一些共同点。这或许会有一点启示吧。 What makes people gay? Biologists may never get a complete answer to tha... 阅读全文>>

日期:2009-03-21 流感病毒侵入体内,发烧一般都不可避免。为什么一感染这样的病毒体温就要升高呢?发烧到底对人体有什么样的影响呢? When your body temperature rises because of an infection, it's called a fever. Fevers are caused by chemicals called pyrogens (热源) lowing... 阅读全文>>

日期:2009-03-21 明明在前进,却看到车轮在朝后转;画面上明明是一个三角形,从某个角度看过去却成了一条线。难道是眼睛出问题了?还是我们的错觉? Humans can see into the future, says a cognitive scientist. It's nothing like the alleged predictive powers of Nostradamus(占... 阅读全文>>

日期:2009-03-21 还在一边打电话一边开车吗?快把电话挂了吧。不是怕警察开罚单,只是这种行为真的很危险。有多危险?看看下面这个研究就知道了。 Why is driving while talking on a cellphone so dangerous? American researchers have shown that language interferes with visual t... 阅读全文>>

日期:2009-03-21 有一句德国俗语说的是每生一个孩子,妈妈就要掉一颗牙。听起来纯粹是乡言奇谈,可是最近研究人员发现,这句俗语还真有点科学含量。 A German folk saying that means every child costs the mother one tooth may hold a lot of truth, research published on Thursday... 阅读全文>>

日期:2009-03-21 感冒会传染,吸烟会传染,可您知道吗?戒烟也可以传染。研究人员发现戒烟也是一种社会活动,也会传染。 Smoking has always been a social habit, but researchers now believe that quitting may be a social activity too. It's no surprise that you're more likely... 阅读全文>>

日期:2009-03-20 我们在走路的时候手臂会不自觉的随着步伐前后摆动,而且还很有规律地在摆动,比如左脚出右手之类的。那么,这样自然的动作搭配是为什么呢? It's all part of a fine-tuned dance of physics and engineering. The skeleton is made of long bones and the many-jointe... 阅读全文>>

日期:2009-03-18 今天西北风,明天又是东南风,还有狂风,微风。风当然是天气中很重要的一个组成部分,风的产生是跟空气的流动有直接关系的。 Air is set in motion by the Pressure Gradient Force (PGF)(气压梯度力). This, as you well know, is a flow from high pressure to low... 阅读全文>>

日期:2009-03-18 头屑去无踪,秀发更出众,这样的一句广告词似乎已经很鲜明地表示了人们对头皮屑的态度。头皮屑是不好的,是不受欢迎的。那么这些白色的小碎屑是怎么产生的呢? Dandruff (also called scurf and historically termed Pityriasis capitis) is due to the excessive shed... 阅读全文>>

日期:2009-03-18 你哥哥认为他比你聪明吗?哼,他可能是对的。根据一项发表在《智力》杂志上新研究,家庭中最大的孩子智商可能最高,最小的智商最低。 Does your older brother think he's cleverer than you? Well, he's probably right. According to new research due to be publish... 阅读全文>>

日期:2009-03-18 关于这个问题的讨论似乎是经久不衰,可答案又不是那么容易得出的。那么,咱们就接着讨论讨论吧。 This question appears regularly in the question file, so let's take a shot at it. In nature, living things evolve through changes in their DNA. In an animal l... 阅读全文>>

日期:2009-03-18 悲伤的音乐能使人落泪,欢快激昂的曲调则会让人精神振奋。音乐对人有影响已经是广为接受的一种观点。可是,说音乐对植物的生长也有影响,你会相信吗? In 1973, a woman named Dorothy Retallack published a small book called The Sound of Music and Plants. Her bo... 阅读全文>>

日期:2009-03-17 飞机失事后经常被提及的一个词就是黑匣子。这个事实上为橙色的黑匣子是用来记录飞机飞行过程中一些重要数据的工具,通过里面记录的相关数据,调查人员可以分析出失事原因。 Black boxes - which are actually orange - are a group of data collection devices mounted... 阅读全文>>

日期:2009-03-17 鱼生活在水里,那它们喝水吗?这个问题似乎有点多次一举,水是生命的源泉,似乎没有生物能离开水吧?鱼当然也离不开水,只不过它的饮水方式有点独特。 Fish live in water, but do they drink it? The answer is yes, but how fish drink water depends on where they... 阅读全文>>

日期:2009-03-16 Maybe his baby will be very intelligent. The baby father ... Alfie Patten with little Maisie Children fathered by older men are likely to be less intelligent than the offspring of younger dads, Australian and US scientists have found in a report pub... 阅读全文>>

日期:2009-03-15 一日三餐已经是我们习以为常的事情,可为什么是三餐而不是两餐或者五餐呢?这还要从一个古老的传说说起。 Hundred of years ago, man had a hard life and was never able to get enough to eat. Sometimes he ate every third day, sometimes only every fifth or six... 阅读全文>>

日期:2009-03-15 平静时下垂,兴奋时上翘,猫咪脸上的胡须似乎成了它的心情晴雨表。有好心的主人看到猫咪的胡须太长就给修剪了一番,结果发现猫咪平衡感突然丧失,连站立都困难。这都是为什么呢? Known as tactile hairs or vibrissae, whiskers are the long, thick, flexible hairs... 阅读全文>>

日期:2009-03-15 人们常用蔚蓝色来形容一望无际的大海,蓝色似乎是天空和海洋的专属颜色,这是为什么呢?世界上不是还有黑海、红海吗?这又是怎么回事呢?原来,这些颜色变化都跟物理学上的反射作用有关系。 Sunlight is made up of all the colors of the rainbow: red, orange, yello... 阅读全文>>

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