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发表于:2018-12-24 / 阅读(154) / 评论(0)

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科学美国人60秒 SSS 2014-10-21

Coyotes. In the last two decades theyve become common in almost every North American metropolitan area. Stanley Gehrt is a wildlife ecologist at Ohio State University who studies urban coyotes in Chicago. He spoke October 20th at the ScienceWriters20

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科学美国人60秒 SSS 2014-10-22

These days, antibiotics are no silver bullet. In fact, if you get them in the hospital, you may end up with an additional infection. Like the bug Clostridium difficile, or C. diffwhich infects more than 300,000 Americans a year and kills some 14,000.

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科学美国人60秒 SSS 2014-10-28

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科学美国人60秒 SSS 2014-10-31

This is Scientific Americans 60-Second Science. I am Christopher itagliata. Got a minute? The human microbiome means community of tiny organisms that live on us and inside us. These creators play a vital role in our health. They calibrate our min-sys

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科学美国人60秒 SSS 2014-09-19

66 million years ago, the check shoot the media right, a rock over 60 miles wild, snapped in to the earth. And you know what happened next, the dinos disappeared. But BB says to consider the big picture for a moment.You have to think not only about t

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科学美国人60秒 SSS 2014-09-22

Sixty-six million years ago, the meteorite, a rock over six miles wide, slammed into the earth and you know what happened next, the dinos disappeared. but Benjemin Blunder, a planty ecologist at the University of Arizona, says , consider the picture

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科学美国人60秒 SSS 2014-09-23

That is prescal child beating a drum in sequence an adult drummer. Here is the prescaler who cannot find the rhythm. Researchers find that the first child who can match the drum beats is more likely to have better early language skills and reading po

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科学美国人60秒 SSS 2014-09-24

Some scientists say that the use of fire helps to make us the modern humans it dramatically changed what and how we eat or may have even altered our enemy. But the University of Utah anthropologist Polly Wisner thinks that the fire is also important

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科学美国人60秒 SSS 2014-09-25

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科学美国人60秒 SSS 2014-09-29

East, they all ready participate in producing some of the most popular pain killer substances around, bear and wine. Now scientists analyze the east can also make some of the most powerful energizes. morphine.They work in the general natural chemical

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科学美国人60秒 SSS 2014-01-15

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科学美国人60秒 SSS 2014-01-14

A steaming mug of coffee helps me wake up in the morning.But it can do more than just keep your eyes open. Caffine may actually boost your memory. Researchers gathered 160 uncaffinated adults, people who consumed less than 500 milograms of caffine in

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科学美国人60秒 SSS 2014-01-13

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科学美国人60秒 SSS 2014-01-10

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科学美国人60秒 SSS 2014-01-08

Its important to trust your gut because the stomach and the food put into it can influence the entire body. For example a new study finds that mice that eat lots of fiber have stronger resistance against asthmatic attacks. For two weeks, let mice eat

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科学美国人60秒 SSS 2014-01-07

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科学美国人60秒 SSS 2014-01-06

The warm waste environment of your mouth makes it a great place for bacteria, some of which keep busy causing cavities. Such dental difficulties were thought to a really taken-off for we switch from hunting gathering to agriculture and had a ready su

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科学美国人60秒 SSS 2014-09-26

Today's early warning systems for earthquakes give you at most a few minutes to prepare for the hit. That's because today's systems rely on detecting the first early rumbles of an actual earthquake before sending the alarm. Now researchers say that f

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科学美国人60秒 SSS 2014-01-01

Haappy New Year. And dont feel bad about taking today off. After all, youve travelled far, and Im not talking about the trip home from the party. According to NASA, just by being on the planet Earth in the last year, youve zipped about 584 million mi

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