1.媒體來源:
The New York Times
http://www.nytimes.com/pages/science/index.html
A. Gamma Rays May Be Clue on Dark Matter
珈碼射線可能是暗物質存在的線索
內容:
A small, newly discovered galaxy orbiting the Milky Way is emitting a
surprising amount of electromagnetic radiation in the form of gamma rays,
astronomers reported Tuesday. The finding may be the latest in a long string
of cosmic false alarms, they said, or it might be that the mysterious dark
matter that permeates the universe is finally showing a bit of leg.
週二，天文學家指出，他們發現了一個全新的銀河，環繞著整個銀河系，並且發出很
強的珈碼射線。這個新發現也許是錯的，但也很可能是長久以來始終神秘的暗物質露
出的第一道曙光。
If confirmed, the results could mean that most of the matter of the universe
is in the form of as-yet-unidentified elementary particles, 20 to 100 times
as heavy as a proton, that have been drifting and clumping like fog in space
ever since the Big Bang.
如果這像新發現能被確認的話，我們就能夠說，自宇宙產生以來，所有的物質都是由一
種基本粒子所組成，它的重量大概是質子的的20~100分之一重。
完整新聞連結:
http://ppt.cc/-3R1A
B.Farmers Put Down the Plow for More Productive Soil
想讓土壤更多養分?放下犁吧 !
內容：
He is talking about farming, specifically soil-conservation farming, a
movement that promotes leaving fields untilled, “green manures” and other
soil-enhancing methods with an almost evangelistic fervor.
保守型的耕作法，主張讓土壤休息。
He no longer needs to use nitrogen fertilizer or fungicide, he said, and he
produces yields that are above the county average with less labor and lower
costs. “Nature can heal if we give her the chance,” Mr. Brown said.
布朗主張：不需要使用氮肥或殺菌劑，大自然會用最自然的方式讓土壤復原。
他們在最少的資金和勞力下，有更多的產出。
Continue reading the main story
But repeated plowing exacts a price. It degrades soil, killing off its
biology, including beneficial fungi and earthworms, and leaving it, as Mr.
Archuleta puts it, “naked, thirsty, hungry and running a fever.”
持續的耕種會讓土壤變的貧脊，對細菌、蚯蚓等都有很負面的影響；
讓土壤休息就是對土壤最好地辦法。
Degraded soil requires heavy applications of synthetic fertilizer to produce
high yields. And because its structure has broken down, the soil washes away
easily in heavy rain, taking nitrogen and other pollutants with it into
rivers and streams.
貧脊的土壤需要更多的合成肥料來提高產出，但可能一場大雨，就會把很多氮肥或污
染物沖入河中。
Soil health proponents say that by leaving fields unplowed and using cover
crops, which act as sinks for nitrogen and other nutrients, growers can
increase the amount of organic matter in their soil, making it better able to
absorb and retain water.
土壤健康學的支持者主張，停止耕犁並使用覆蓋作物，土壤的有機物會逐漸增加，
並更能蓄藏水份。
完整新聞連結：
http://ppt.cc/PpaJ