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[时差N小时] 时差N小时:少吃盐对健康有益(上)
I know it’s a good idea for adults to watch how much salt they eat, especially if they’re at risk for high blood pressure. But what about kids? Should parents cut back on how much salt th2012-01-09 编辑：beck
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[时差N小时] 时差N小时:果实成熟(下)
Plants attract fruit eaters，or frugivores–by packing valuable resources into their fruits like sugar and water or important nutrients such as carotenoids, vitamins and minerals. Plants often t2012-01-20 编辑：beck
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[时差N小时] 时差N小时:戒烟的最好办法(下)
However, the effect was short lived. Within three months, both groups of callers were more or less equal when it came to how many had remained smoke-free. The researchers are optimistic, though, that2012-01-12 编辑：beck
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[时差N小时] 时差N小时:戒烟的最好办法(上)
We all know that smoking is unhealthy. But what’s the best way to get someone to quit? By harping on the dangers of lighting up, or by touting the benefits of kicking the habit? According to on2012-01-11 编辑：beck
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[时差N小时] 时差N小时:咖啡渍的奥秘(下)
Why is that? It’s because the edges of the spill are where the fluid is at its thinnest. A spill sitting on a flat surface is something like a pancake. Big in the middle and thin on the rim. As2012-01-16 编辑：beck
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[时差N小时] 时差N小时:热量动能(下)
Take two nails and scrape them together vigorously. Now touch the place you were scraping. It’s hot! Let them cool and try it again. It’s hot again! You could do this all day and the nail2012-01-31 编辑：beck
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[时差N小时] 时差N小时:喝尿是安全的吗?(下)
But if you kept recycling urine by urinating and drinking it multiple times, wouldn’t those minerals eventually build up until the urine was no longer safe? Over several days, your urine would2012-01-18 编辑：beck
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[时差N小时] 时差N小时:咖啡渍的奥秘（上）
Next time you spill a little, let the coffee dry before wiping it up. You’ll notice that after it dries there is a darkish ring around the very edge of the spill, whereas the middle disappears2012-01-13 编辑：beck
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[时差N小时] 时差N小时:北冰洋的淡水湖忧患(上)
An ocean is the last place you’d expect to find a freshwater lake. As strange as it may seem, the Arctic Ocean is home to a lake roughly twice the size of Lake Victoria, one of the largest fres2012-02-03 编辑：beck
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[时差N小时] 时差N小时:为何月球上没有餐厅(上)
Why are there no restaurants on the moon? Great food. No atmosphere. The atmosphere is the layer of gases that surrounds a planet or other massive body. Although our atmosphere extends for tens of mi2012-02-01 编辑：beck
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[时差N小时] 时差N小时:北冰洋的淡水湖忧患(下)
Most marine organisms are adapted to the ocean’s salt concentration. Just as humans cannot drink saltwater, plankton and other small marine creatures floating with the currents cannot survive i2012-02-06 编辑：beck
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[时差N小时] 时差N小时:昆虫的世界(上)
Have you ever walked into a swarm of insects—gnats, mosquitoes, or one of their many cousins–and then found yourself unable to shake the swarm? You fake left, go right, but the little buggers2012-02-07 编辑：beck
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[时差N小时] 时差N小时:为何月球上没有餐厅(下)
But more than these kinds of natural processes are needed to have an atmosphere. You also need gravity. Without sufficient gravity, any gases will just leak out into space and be gone. Earth loses so2012-02-02 编辑：beck
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[时差N小时] 时差N小时:昆虫的世界(下)
Here’s how Knab explained it: males gather around some landmark—a cornstalk, perhaps the head of an unsuspecting human–and wait for eligible females. When a female enters the swarm, the2012-02-08 编辑：beck
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[时差N小时] 时差N小时:耳石(上)
Ear rocks, also known as otoliths, are tiny pebbles of calcium carbonate in our inner ear that help keep us balanced. They’re located deep inside the inner ear in a small pouch called a utricle2012-02-09 编辑：beck
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[时差N小时] 时差N小时:蝙蝠的唾液 Bat Spit
是的，这些小家伙是真实的，尽管它们几乎没有垂涎于温雅的罗马利亚人，但它们却经常流口水2014-07-14 编辑：mike
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[时差N小时] 时差N小时:动能与势能相互作用
秋千的工作原理是将势能转化为动能，然后又将动能再转化为势能，一遍遍的重复这个过程2014-07-11 编辑：mike
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[时差N小时] 时差N小时:你能让无糖可乐浮起来吗?
虽然，无糖可乐和普通可乐的成分很相似，无糖可乐中添加的并非真正的糖，而是一种做“阿斯巴甜”的合成化学物2014-07-15 编辑：mike
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[时差N小时] 时差N小时:头球危险吗?
Webbe和同事测试了足球运动员的神经认知，比如注意力、集中力、思维反应2014-07-21 编辑：mike
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[时差N小时] 时差N小时:偏头痛还是脸部疼痛?
古代的科学家和哲学家称，神谕的力量来自从深坑冒出的袅袅蒸气以及神庙内殿神龛喷出的泉水2014-07-10 编辑：mike
