【Phat Yeti出品】60-SECOND SCIENCE 官方听力文稿 + 讨论帖 （更新至：2008.03.07）

深海lavenderUID: 2350207

:funk: 汗.......我又不是批评他.......我怎么会批评我兄弟呢~~;d:

深海lavenderUID: 2350207

怎么都没人顶......太不景气了.
UP+顺便水下

豆豆～UID: 2378384

你的分好多，比我都多1W了～～分给我点吧;d:

magic1986wangUID: 2323140

请问大家听写这个大概用多少时间呢？

豆豆～UID: 2378384

总的听2遍，一些细节可能听3~4遍吧:)

豆豆～UID: 2378384

Reptile Sex Determination Is Hot Topic

Every expectant mother gets asked the same question: boy or girl? For mammals like us, it’s an easy call. Two X chromosomes you get pink booties. X and a Y you get blue. But for some reptiles, the answer depends on the weather. Well, on the temperature to be precise. For many lizards and turtles and gators, the sex of the hatchlings depends on the temperature in the nest where the eggs incubate.

But why would animals bother with such a seemingly slapdash system for assigning sex? The only logical answer is: there must be some benefit. Each sex must fare better at the temperature that tends to produce that sex. A fine theory, but no one has been able to test it. Until now.

In the January 20 online issue of Nature, scientists at Iowa State University describe how they used hormones to produce lizards with the “wrong sex”—animals that came out male even though they were incubated at the female temperature. And vice versa. They found that females born and raised at the female temperature made more babies than females hatched at the wrong, male temperature. Ditto for the males. Call it the Goldilocks principle.  You’re born at a temperature that’s just right—at least if you’re a lizard.

深海lavenderUID: 2350207

......
我只听不写,太懒.

zhoushengyuanlyUID: 2246479

:handshake 。。。比我强。。我都忘听了:( 。。检讨

深海lavenderUID: 2350207

你的QMD......
昨天晚上换的?
知道了.

豆豆～UID: 2378384

Put A Pullet In Your Tank

The search for alternative fuels to gasoline has led to surprising possibilities—for instance, the waste oil from making French fries.  But one of the most unusual alternative fuel candidates might be chicken fat. Yes, chicken fat, also called schmaltz.  So if you make chicken soup you might have a valuable resource in your kitchen—besides the actual soup.

Chemical engineers at the University of Arkansas report that when chicken fat is combined with methanol under very high temperatures and pressure (known as supercritical conditions) they got biodiesel.  The method converted 89 percent of the chicken fat to biodiesel. The research was done as part of a master’s thesis project by chemical engineering student Brent Schulte.

Many people have high hopes for biodiesel as a replacement for fossil fuels, because it uses renewable resources such as plant oils, or in this case chicken fat, of which there is certainly no shortage. The hunt for biodiesel may mostly take place outdoors.  But the potential of French fry flotsam and chicken fat also means the search can sometimes end in the kitchen.

zhoushengyuanlyUID: 2246479

up...

深海lavenderUID: 2350207

up.

chori84UID: 2343163

很不错~:)

深海lavenderUID: 2350207

继续UP.
原来以为东西递出去了会发大洪水,现在居然累的不想水了.........

lintelleUID: 2297267

不水。

我们一起发火把。