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发表于:2018-12-24 / 阅读(152) / 评论(0) 分类 未知分类

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发表于:2018-12-24 / 阅读(143) / 评论(0) 分类 未知分类

This Scientific Americans podcast is sponsored by audible.com, the number-one online resource for best-selling audio books and more. And now audible.com is offering Scientific American listeners a free audio book of your choice. For details go to aud

发表于:2018-12-24 / 阅读(157) / 评论(0) 分类 未知分类

This is a season when becteria sinus infections run rampant, but some people are better able to ward off that malady. And they can be identified by their taste buds, because those of us who can better detect bitter flavors may also be better equipped

发表于:2018-12-24 / 阅读(198) / 评论(0) 分类 未知分类

Humpback whales sing most frequently where and when they breed. But researchers have just discovered that whales can sing complex songs even when diving and foraging, when its neither the time nor the place for mating behaviour. The study is publishe

发表于:2018-12-24 / 阅读(209) / 评论(0) 分类 未知分类

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发表于:2018-12-24 / 阅读(214) / 评论(0) 分类 未知分类

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发表于:2018-12-24 / 阅读(114) / 评论(0) 分类 未知分类

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发表于:2018-12-24 / 阅读(128) / 评论(0) 分类 未知分类

Babies benefit from breast-feedingthey have a lower risk of infections, vomiting and diarrhea and less of a chance of later developing adult onset diabetes. And now a study finds that being breast-fed helps protect infants who are genetically predisp

发表于:2018-12-24 / 阅读(184) / 评论(0) 分类 未知分类

Advocates for self-driving cars love to tout the benefits the cars would bring, such as fewer accidents and less congestion. Another alleged value of being a passenger rather than a driver is more productivityyou could work rather than concentrate on

发表于:2018-12-24 / 阅读(183) / 评论(0) 分类 未知分类

It's bad enough that mosquitoes suck our blood, and sometimes pass on disease. But there's more. They can actually give you a disease and pee on you at the same time. Adding insult to injury if you will. Jerod Denton, a pharmacologist at Vanderbilt U

发表于:2018-12-24 / 阅读(182) / 评论(0) 分类 未知分类

When you spill a liquid on the ground, it splashes. But if youre a guy using a urinal, or, more important, if the liquid is dangerous, say, an infected blood sample, you want to limit splashing. In other words: If an accident happens, you want the dr

发表于:2018-12-24 / 阅读(173) / 评论(0) 分类 未知分类

Old Yeller was a great smeller. Dogs in general have superior smelling abilities. They detect dead bodies, illegal drugs and explosiveseven cancer. But dogs don't just have great olfactory gear. Another reason they're amazing chemical detectors? [sni

发表于:2018-12-24 / 阅读(173) / 评论(0) 分类 未知分类

Perhaps youve seen the famous TED talk about so-called power poses. It encouraged viewers to change the course of their lives by assuming what are thought of as dominant postures. So you make yourself big, you stretch out, you take up space. You're b

发表于:2018-12-24 / 阅读(169) / 评论(0) 分类 未知分类

As you've probably experienced firsthand, some mosquito species have a real taste for warm, human blood. So much so that if you raise them on it the lab, they'll accept no substitute. Fortunately, I don't get major reactions at all. Brad Main is a mo

发表于:2018-12-24 / 阅读(233) / 评论(0) 分类 未知分类

In the 1970s, researchers unearthing an ancient synagogue at Ein Gedi, near the Dead Sea, discovered the structures Holy Arkthe container in which early Jews would have stored the Bible as they prayed. The site was home to a large Jewish community fr

发表于:2018-12-24 / 阅读(211) / 评论(0) 分类 未知分类

Today's cars have loads of computer smarts built in. Like the chips that allow you, with the push of a button to unlock your car. And as new cars move down the assembly line, automakers program those functions into the car. They produce one car and t

发表于:2018-12-24 / 阅读(213) / 评论(0) 分类 未知分类

Pigeons. Ever since humans established permanent agricultural settlements, weve lived side-by-side with the birdsor, as some people call them, rats with wings. They walk on our sidewalks, roost on our buildings, and eat our leftovers. But soon pigeon

发表于:2018-12-24 / 阅读(161) / 评论(0) 分类 未知分类

Black holes got their name because light can't escape them, beyond a certain radiusthe event horizon. But in 1974 Stephen Hawking proposed that quantum effects at the event horizon might cause black holes to benot completely black. Hawking said that

发表于:2018-12-24 / 阅读(179) / 评论(0) 分类 未知分类

As humans developed civilizations in Eurasia and Northern Africa, they also domesticated animals for food and labor: horses, cows, goats, pigs, sheep and a few others. But no evidence existed for the deliberate cultivation and breeding of animals in

发表于:2018-12-24 / 阅读(167) / 评论(0) 分类 未知分类
学英语单词
Active portfolio strategy
activin(Act)
adjustable pedal
alpinums
an-even
anagrammatization
antilogia
Asotin
bit-mapping
black-capped chickadees
bush wetland
buzzed off
cataphonic
catnapers
chemical apparatuses
choral society
collect call
coordinatize
cotton worsted
cross-legged progression
cushioning stroke
de nos jours
deceaser
desymmetrisation
dustcollector
electric field force
error of object
femto-candela
field mesh electrode
fighting ship
final exploration
flex-foot
foodresidue
fracture morphology
free trade
frequency-response
fuel ignition
genus trolliuss
gogel
Gradenigo's syndrome
Hand's disease
ill-shapeds
imports and exports
inter company elimination
internal administration
intumescence
jonjo
kaguans
kilij
kroeung
labour overturn
lagune
lower flow regime
make one's own life
manganese metal
master synchronization pulse
maximum digging radius
N,N'-diphenyl-p-phenylenediamine
Natrii Sulphas
negligible module
notch plate
octahedral site
ostwald-de waele model
output angle
partial redundancy
phenol-coefficient method
piezoresponse
piledown
poother
port peripheral data register
prolonium iodide
proximal radius
pump light source
pyramid sign
ratchet wheel pawl weight
rectifier-type differential relay
rhodiolae herba
rising of arch
second edition
section of communication
SED TV
simple obligation
sizabler
size class
sources of signal-flow diagram
specified entity
spongey
spread spectrum titransmission
sprung out
steam pipe union
substitutes' bench
Teucrium scordium
thisness
Thronies
titled nobody
trialkylphosphines
unripe cotton
upper atmospheric dynamics
valgus deformity
vena subclavia
verbenone
vogelstein