Scientific American 60 Second Science听抄（有音频文件）

kelediguoUID: 149939

2007-07-11

Would you rather listen to a new song or golden oldy? Well, in the world of songbirds it’s the new tunes that attract attention. A Duke University researcher got recordings of male white-crowned sparrows’ songs from 1979 and from 2003. They are very close but there are some subtle differences. The old version is kind of vintage Michael Jackson, high pitch with rapid trills. The newer version veers more to your Barry White area--lower in pitch and a more deliberate trill. Here they both are, the old one first. Females who heard the newer song exhibited their species typical ‘how you doin’’ responses. But when they heard the old song, it was more like ‘Er’. And males hearing the new song got agitated much more than when they heard the older standard. The study was published in the online version of the journal Evolution. Changes in song over time or geography could be the first tiny steps in the development of a new species.

kelediguoUID: 149939

多谢zhenzhen_163 ！

zhenzhen_163UID: 196150

I am very glad you guys find my comments helpful. Thanks.   :handshake

yq_112397UID: 2286548

on H-KEVIN

July 10

On the July 3rd podcast we talked about a variety of super hot jalapenos pepper that’s brand new. Now comes news about some chili pepper that are really old. Two caves in southern Mexico were found to contain leftovers, possibly 1500-year-old leftovers of ten different kinds of cultivated chili peppers. That's according to Smithsonian researchers writing in the latest online issue of the Proceedings of national Academy of Sciences The arid conditions the in the caves preserve plants well and have already offered info about ancient Mexico agriculture. For example, squash was cultivated in the region 10,000 years ago. And caves also contain corn, beans and avocados in addition to chili peppers. It would take a genetic analysis to tell if the chili varieties correspond to modern peppers, although one kind of peppers looks a lot like a modern cayenne and another like Tabasco. The researchers did determine that people who grew the peppers used them both fresh and dried. One cave that had 7 varieties leading a researchers to say, you do not grow 7 different kinds of chilis unless you are cooking some pretty interesting food.

suremanUID: 2303461

我觉得大家应该搞个次序，听抄的时候自己写，但是如果要贴上来的话还是先看看有没有别人贴出来，如果有的话，看自己有什么不同，如果不能妥协，那么请把不同的地方标注出来，这样再后来的人可以讨论。
一天后，希望能出来一个相对比较标准的，大部分人都认同的版本。
讨论，才是重点，秀，白费力气！

mubbyUID: 2300654

呵呵，贵在坚持，接下来就会很好了！

tjlstlove26UID: 2319674

on yq_112397 July 10

On the July 3rd podcast we talked about a variety of super hot jalapenos pepper that brands new. Now comes news about some chili pepper that are really old. Two caves in southern Mexico were found to contain leftovers, possibly 1500-year-old leftovers of ten different kinds of cultivated chili peppers. That's according to Smithsonian researchers writing in the latest online issue of the Proceedings of national Academy of Sciences The arid conditions the in the caves preserve plants well and have already offered info about ancient Mexico agriculture. For example, squash was cultivated in the region 10,000 years ago. And caves also contain corn, beans and avocados in addition to chili peppers. It would take a genetic analysis to tell if the chili varieties correspond to modern peppers, although one kind of peppers looks a lot like a modern cayenne and another like Tabasco. The researchers did determine that people who grew the peppers used them both fresh and dried. One cave having 7 varieties leads a researcher to say, you do not grow 7 different kinds of chilis unless you are cooking some pretty interesting food.

starcxUID: 2233586

嗯 严重同意#1024sureman的观点，大家可以在讨论1同进步啦。:p

linkunkun7UID: 2196646

这篇好好笑哦。。。

pebbleniuUID: 2358037

坚持~~:)
我也觉得其实讨论很重要，有没有人建个qq群专门用来讨论不准确的地方啊？
要不有不同意见也不知道对错...每天就这么糊涂过去了

xbx_leeUID: 129512

总是被人忽略啊，这个建议我在1000楼提过了，都没人理我。。。

c2787862UID: 2361990

very useful thanks

zhenzhen_163UID: 196150

Follow my posts and I promise you will not keep on being 糊涂。  :)

dcbUID: 2232749

新手，各位nn请指教

July 12, 2007: 60-Second Science
Future Safe Tailgating Could Save Fuel, Cut Emissions  

If people all train their cars and for bicycles, they can still be environmentally friendly by driving in groups--the way by cyclists do. In your cars called "Tailgating", it's a terrible idea. But cyclists call it drafting--talking in wide behind another bicycle to cut wind resistants and therefore energy output that's a great idea. And an article in the new issue of the international journal of the environment and pollution theorizes that an automated system that would let cars travel in very tight groups, like bicycles do, would indeed save fuel, cut greenhouse gas emissions and also cut highway congestion. As specially, with fast developing countries like China and India becoming home to huge numbers of new cars and roads. Obviously, driving in tight packs of cars is incurringly a sensible option. But large distances between millions of more cars in the future may also not be a sensible option. And automated systems that would let a driver pull a few feet of another car will have an additional benefit to both passengers and the environment less road noise which is another real drag.

Wiki上的解释：
Tailgating is the practice of driving on a road too closely behind another vehicle, such as less than the travel distance in two seconds or equivalently, one vehicle-length for every 5 mph of the current speed. In most cases people do it because out of frustration toward, or in order to help get past a slow moving vehicle which is impeding their progress. Some slow vehicles will not speed up or pull over when the situation arises and this is seen as selfish behaviour and may also be illegal in some jurisdictions due to its increased potential for causing a car accident. Tailgating is also illegal in some jurisdictions due to increased risks of causing an accident.

[ 本帖最后由 dcb 于 2007-7-13 00:48 编辑 ]

kevinliu6883UID: 2338522

If people won’t trade their cars in for bicycles, they can still be environmentally friendly by driving in groups-- the way bicyclists do. In your car, it is called tailgating. It’s a terrible idea. But cyclists called drifting, talking in right behind another bicycle, to cut wind resistance and for energy output, that’s a great idea. And an article in the new issue of the International Journal of Environment and Pollution theorized that automated system that would let cars travel in very tight groups like bicycles do, would indeed save fuel, cut green house gases emission, and also cut highway congestion, especially with fast developing countries like China and India becoming home of huge number of new cars on roads. Obviously driving in tightly packed cars is currently a sensible option. But large distance between millions of more cars in future may also not be sensible option. And automated system that would let driver pull few feet far from another car, will have additional benefit for both passengers and environment, lessening road noise, which is another real drag.