2018年科学美国人

Old Trees Are Ecosystem Gold Well, lots of people recognize that as humans get older they tend to have less and less children...trees do it the other way around.David Lindenmayer. He studies conservation, landscape ecology and biodiversity at the Aus

发表于:2019-02-13 / 阅读(130) / 评论(0) 分类 2018年科学美国人2月

Bees Prefer Flowers That Proffer Nicotine We humans enjoy coffee and tea, to give our brains a caffeine boost. And bees sometimes sip nectar that naturally contains caffeine, which seems to enhance their memory. Now a study suggests that bees enjoy a

发表于:2019-02-13 / 阅读(139) / 评论(0) 分类 2018年科学美国人2月

Your Cat Thinks You're Cool We tend to see housecats as aloof and independent, mostly preferring to engage in their own kitty business. But that assumption may be littered with error. Because a new study finds that, given a choice, Fluffy would proba

发表于:2019-02-13 / 阅读(135) / 评论(0) 分类 2018年科学美国人2月

Spiders Gobble Gargantuan Numbers of Tiny Prey By now, you may have heard about a study that came out a couple of weeks ago about spiders. The study got a lot of attention because coverage of the research often focused on the idea that spiders could

发表于:2019-02-13 / 阅读(162) / 评论(0) 分类 2018年科学美国人2月

New Map Knows Noise It's harder and harder to find peace and, especially, quiet. Just ask a field researcher deep in the wilderness. Even in the most remote parts of Alaska the sound of a jet crossing overhead is all too common. 寻求安宁越来越难

发表于:2019-02-13 / 阅读(143) / 评论(0) 分类 2018年科学美国人2月

Fecal Transplanters Fish Out Key Ingredient 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

发表于:2019-02-09 / 阅读(143) / 评论(0) 分类 2018年科学美国人2月

Wild Songbirds Can Pick Up New Tunes Only a few kinds of animals are known to learn their vocalizations from listening to others. Us, of course. Elephants. Bats. Cetaceanswhales and dolphins. Pinnipedswalruses, seals and sea lions. And parrots, hummi

发表于:2019-02-03 / 阅读(139) / 评论(0) 分类 2018年科学美国人10月

Solar Eclipse Was Buzzkill for Bees Last summer's total solar eclipse sliced right through Columbia, Missouri. It was remarkable. As a biologist I generally reserve that word 'remarkable' for biological phenomena.Candace Galen is based at the Univers

发表于:2019-02-03 / 阅读(181) / 评论(0) 分类 2018年科学美国人10月

Health Care Let Neandertals Punch above Their Weight Health care isn't just a benefit of the modern human age. It goes way back. All the way, even, to the Neandertals.We imagine they would have been cleaning wounds, dressing wounds. Penny Spikins, a

发表于:2019-02-03 / 阅读(192) / 评论(0) 分类 2018年科学美国人10月

Tally up all your 'regular spots'places you visit on a weekly basis like restaurants, markets, parks. And what do you get? A new study says that most of us limit our hangouts to some 25 places.So every time we adopt a new place, we abandon another on

发表于:2019-02-03 / 阅读(139) / 评论(0) 分类 2018年科学美国人10月

Asocial Octopuses Become Cuddly on MDMA When humans take the drug MDMAbest known as ecstasythey feel a deeper connection to othersemotionally and physically. Because MDMA affects serotonin, a nervous system chemical. Serotonin is one of the oldest ne

发表于:2019-02-03 / 阅读(152) / 评论(0) 分类 2018年科学美国人10月

Economics Nobel Highlights Climate Action Necessity The first thing is that people have to come to grips with the difficulties we face. I think the scientists have and many of the people have, but the governments have to.Yale Universitys William Nord

发表于:2019-02-03 / 阅读(126) / 评论(0) 分类 2018年科学美国人10月

For Halloween, Consider the Chocolate Midge As you unwrap a Halloween candy or two, it's worth paying your respects to the real reason for many of the treats: a tiny fly whose trick is to make chocolate possible. They're all in the family Ceratopogon

发表于:2019-02-03 / 阅读(106) / 评论(0) 分类 2018年科学美国人10月

Bones and Stones: Cemetery Geology A tour of Woodlawn Cemetery in the Bronx, N.Y., focuses on the geology of the landscape and the mausoleums. 参观纽约布朗克斯区的伍德劳恩公墓,他的研究重点是当地的地质景观和陵墓。

发表于:2019-02-03 / 阅读(130) / 评论(0) 分类 2018年科学美国人10月

Highway Crossings Protect Migrating Pronghorns--and Motorists Ever hear of the pronghorn antelope in the American west? Well, its not really an antelopeits actually more closely related to giraffes than to true antelopes. And the last known migration

发表于:2019-02-03 / 阅读(134) / 评论(0) 分类 2018年科学美国人10月

Antifreeze Surface Fights Ice with Ice Every year, 20 million tons of salt are dumped on roads and highways across the U.S. to eliminate ice. And airlines spray up to 1,000 gallons of antifreeze on any one plane to de-ice it. But now scientists have

发表于:2019-02-03 / 阅读(210) / 评论(0) 分类 2018年科学美国人10月

Sharks aren't typically thought of as vegetarians. Or even omnivores. But about 10 years ago, scientists documented a dainty relative of the hammerhead shark, known as a bonnethead shark, consuming copious amounts of seagrass. 锤头鲨通常不被认为

发表于:2019-02-03 / 阅读(152) / 评论(0) 分类 2018年科学美国人10月

Dolphins Dumb Down Calls to Compete with Ship Noise The oceans are getting louder. And coastal areas are some of the noisiest, as in this underwater recording, captured 17 miles off the coast of Ocean City, Maryland. 海洋的声音越来越大。在这

发表于:2019-02-03 / 阅读(143) / 评论(0) 分类 2018年科学美国人10月

Radiation Might Help Heart Regain its Rhythm That beeping sound is the normal beating of a heart. But here's what the same heart sounds like, during a bout of ventricular tachycardia, or VT the racing beats are caused by an electrical short circuit i

发表于:2019-01-20 / 阅读(144) / 评论(0) 分类 2018年科学美国人1月

You Live In a Strange Solar System The more astronomers study the heavens, the more they realize: our solar system is weird.There are a few things that make the solar system kind of strange.Lauren Weiss, an astrophysicist at the University of Montrea

发表于:2019-01-20 / 阅读(141) / 评论(0) 分类 2018年科学美国人1月
学英语单词
ablative flashlamp
account flow chart
administrative control
alfaroes
apparent material
atenen
barres
basal skull fracture
boiler hold
borax lake
brick saw
British Export Houses Association
Brynford
burakumin
catatony
centini
charcos
chemolumiosity
cinder dicks
cold - rolled steel
collect a debt
conical base solid tyre
continuous solid body
core tool
corner cutting
cowwheats
cry against
dahendan
death-ray
deforming cervical spondylosis
dibutyltin dichloride
direct debit authorization
discrete bivariate random variable
divide time
drink sth to the dregs
Dzheltulakh
electronic lighter
Entuss
essential service water
first-hand
FPW
free-form curve
gallucci
glass-to-metal seal
Gregory of Sinai
hepatic pulse
hetrick
high-speed circuit-breaker
hopped on
Hurlford
incomplete part of branch
inducto-
instrumentational
intermediate bearing
international geodetic association
jigme
Kazakstan, Kazakhstan
kick up a shine
lake ontarios
laubierinids
light-colored surface
logical-mathematical intelligence
magneto optic resonance
national measurement
NAVC
nonstationary oscillation
oil pudding
overexpanded nozzle
peak transient pressure
percentage registration
plasma jet gouging
proportional revolver
prosperity and depression
protoplasmic reticulum
pseudohecogenin
radiopacification
rauhimbine
residual cylinder stock
scarlet begonia
secondary sterilization
selection pressure
shifting period
shotcrete shell
slide wire resistor
stricture of external auditory canal
tamanrassets
tangent helix angle
teleoroentgenograh
telephone instruction
tribunaux de commerce
troght
Tuttle's mask
universal value
unpacked goods
vacuum extensometer
ventilating hole
volume cost
volunta
wavelets
Wi-Fi Direct
world-known