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[時差N小時] 時差N小時:鉆石的年齡(上)
You walk into a fancy party. What is the oldest thing there? No, not your in-laws, or even your grandparents. It will be a diamond someone is wearing. It’s not completely clear how natural diam2011-12-20 編輯：beck
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[時差N小時] 時差N小時:為何孕婦需要遠離交通繁忙區域?(下)
It’s not clear why, exactly, heavy traffic could cause premature birth. Air pollution from car exhaust could have something to do with it. Some studies have found that women exposed to high lev2011-12-19 編輯：beck
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[時差N小時] 時差N小時:為何孕婦需要遠離交通繁忙區域?(上)
Ideally, pregnant women should do everything they can to have a full term pregnancy, because babies born even a few weeks early risk being less healthy and possibly suffering from long term disabilit2011-12-16 編輯：beck
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[時差N小時] 時差N小時:風力發電機(下)
Turbines with one or two blades are actually even more efficient. But because they’re also lighter and tend to spin faster, they’re also noisier. These designs also require a special tilt2011-12-15 編輯：beck
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[時差N小時] 時差N小時:風力發電機(上)
If you’ve ever driven by a wind farm, you may have noticed that the turbines most likely have three blades. Not two, not five, but three. Now, you may think that if the point of a wind turbine2011-12-14 編輯：beck
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[時差N小時] 時差N小時:為什么馬的腿很細?(下)
Then that foot stops and the other one accelerates. And so on. Thinner, lighter things are easier to accelerate than heavy, massive ones. So if you want speed, put the muscles up high and the skinny2011-12-13 編輯：beck
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[時差N小時] 時差N小時:為什么馬的腿很細?(上)
Why horses have skinny legs? What’s the use of a skinny leg? The answer is Running. The skinniest lower legs belong to the fastest runners. Think of how a deer can move, as opposed to a tortois2011-12-12 編輯：beck
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[時差N小時] 時差N小時:有錢就一定幸福嗎?
Does money make us happy? Well, according to that famous Beatles song, no: Money Can’t Buy Me Love. But, of course, the Beatles also had a hit with their cover of the Motown song Money, That&rs2011-12-09 編輯：beck
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[時差N小時] 時差N小時:箱子底部的玉米薄片為什么不會被壓碎(下)
The friction between the flakes is the same force that causes sand to form a pile rather than spread out like a puddle. In fact, this same principle applies to all granular materials. If you cut the2011-12-08 編輯：beck
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