【英语时差8,16】历史最悠久的甜味剂（上）

Honey has been around for a very long time. Cave paintings in Spain from over ten thousand years ago show people harvesting honey. Today honey is mostly used for its distinctive flavor, but for baking it has another advantage as well: baked goods mad

【英语时差8,16】鞋子里的GPS（下）

But measuring movement is actually pretty tricky. Any small mistake in the measured acceleration results in position errors that grow with time. So even if youre standing still and just rocking in place, a navigation computer relying solely on the IM

【英语时差8,16】现在的老年人更聪明

If 50 is the new 40 and 60 is the new 50, whats the new 70? Well, it seems safe to at least say that 70 isnt what it used to be. And thats good. Because a new study finds that 70-year-olds did better on intelligence tests than 70 year olds used to do

【英语时差8,16】选择约会电影

In this Moment of Science Don and Yael discuss a scientific way to choose the perfect date movie. Don: Okay, Yael, if you were me, would you take your date to a violent action flick or a romantic movie? Yael: A romance, of course. D: Well, there migh

【英语时差8,16】用一根绳子连接地球和同步卫星（下）

When you haul something up by rope, you generally think of the object being lifted as the weight. Something we dont consider is that the rope has to be able to lift itself too. Lift itself!?! What does that mean? Think of it this way. If a ten-foot r

【英语时差8,16】核电厂更安全了吗？（上）

In 1979, there was an incident at a nuclear power plant on Three Mile Island, in Pennsylvania, when radioactive steam leaked into the open air. Nobody was hurt, although thousands of people fled the area. Seven years later, a much worse accident happ

【英语时差8,16】核电厂更安全了吗？（下）

According to the 2009 update of an MIT study first published in 2003, nuclear power plants in the United States have become more reliable and significantly safer. For one thing, nuclear plant operators now receive better and more rigorous training. A

【英语时差8,16】录像机如何记录（上）

Although audio tapes and video tapes look different, theyre based on the same principles. Each has a roll of magnetic material which slides past the so-called playback head in the VCR or cassette deck (cassette decks have one playback head, VCRs have

【英语时差8,16】鼻塞（下）

Unfortunately, theres no quick and easy way to dry up a toddlers runny nose. Although anti-histamines may stop the drainage, they can also clog up the nose and keep the mucus from draining away germs. A runny nose can become a sign of a more serious

【英语时差8,16】五彩蛋

Depending on the species, bird eggs can be any color ranging from chickens plain white to a robins blue, streaked, spotted, bright, pale, and anything in between. Today, on a Moment of Science, we take a look at some of the reasons this might be the

【英语时差8,16】录像机如何记录（下）

But heres a mystery: When you press pause on the VCR, the screen doesnt go blank. Instead, you get a frozen image. Remember, you need a changing magnetic signal to create even a still video image. If the video tape isnt moving, where is this changing

【英语时差8,16】猫咪会吃蜘蛛吗？

Do cats eat spiders? Our answer? Yes, they do. And thats not all cats will eat. Cats, both domestic and wild, are obligatory carnivores, meaning that they dont have the chemical tools in their bodies to access nutrients from plants. So they have to e

【英语时差8,16】信念6条（下）

Additionally, Muslims must believe in the prophets, many of whom are responsible for bringing Allahs revelations to man. Among the prophets are the Prophet Muhammad, Jesus and Moses. Resurrection and a day of judgment, which are crucial to the Christ

【英语时差8,16】最成功物种

For many scientists, a species success is measured by sheer numbers. In that case, the most successful species known to man is a type of bacterium known as S-A-R-11, or SAR-11 for short. Scientists estimate that there are two-hundred and forty times

【英语时差8,16】洋葱对宠物有毒

You may already know that chocolate can be lethal to your pet, but did you know that onions can be toxic to your cats and dogs too? And Im not just talking about their breath. You say all forms of onionscooked, raw, dehydratedcontain contain sulfur c

【英语时差8,16】Manners 文明礼貌

Tips: complimentary 称赞的 cheers （英国口语）谢谢 ill-mannered 不讲礼貌的 disrespectful 不尊重他人的 split families 破裂的家庭 role models 榜样 Manners 文明礼貌 Good day.Nice to meet you.Pardon? I guess some people d

【英语时差8,16】母婴联系（上）

However, the observation that morphine can decrease social behaviors as well prompted scientists to investigate the connection between the opioid system and social relationships. They compared normal baby mice to baby mice lacking a crucial opioid re

【英语时差8,16】鸟类的饮食与羽毛（上）

Sometimes its easy to understand how an evolutionary change took place, but its more difficult to understand why. For example, consider the beautiful birds of paradise which live in the forests of New Guinea. The males of many bird-of-paradise specie

【英语时差8,16】英国美国大不同-下

William: In terms of cultural differences Joe, I mean like there are lots and lots of cultural differences aren't there between the UK and the States... Joe: Yeah. I think it was Bill Bryson who said that Americans live like they're never going to di

【英语时差8,16】狗比猫弱？（下）

Now, even small dogs are genetically programmed to function like predators, which makes sense considering they are close relatives of wolves. And birdsyou can probably figure out why the only way youd find out your bird is sick is when it dies. The s