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
-nicate
72h trial running
activation fragment
agreed price
alexander von kluck
America-Antarctic Ridge
Automatic Size
aversion to heat
back-projection reader
Bayrac's test
best of luck
billbergia macrocalyx hook
birainy
blister gas
bonus and premium plan
brainstorms
capacitor induction motor
cast zinc alloy
civilian conversion
cloud species
commercial business tax
consone
contemporisations
contract financing
cucullaris
Day of the Dead
deciampere
disquantity
distinct account
dive straddle
divinity college
dochmiasis
electro-magnetism
elliptic pseudo-differential operator
falkmen
foetal echo
foot-
fortrans
friction skidding device
gaber
genus galagoes
governor friction
grecizes
hard-packed
harmonious
health campaign
heater mixer
hituminous sandstone
Idar
Jozabad
Koilodepas hainanense
La Plata otter
lady's bedstraw
laoticum
level compander
manganites
mean-time-to double failure
mel gibsons
metatarsal veins
migratory aptitude
Muechlenbeckia
nanofluidic
noisette rose
nonfinancial debt
ochered
overfrozen
parallel combined mechanism
pea-like
perimicropylar
philaterie
placentophagy
pressure and velocity stages
primary gyratory crusher
proslogions
pump-actions
rangeomorph
renying
rf gap
rhenium oxide
rivalry of colors
rood-stake
saturation current method
sb has arrived
self efficacy expectation
simplex kiln
solo album
sources of illumination
spaghetto
spoon-knife
synthetic estrogen
tape-wound resister
tiled viewports
Time-honoured practice
universal testing machine
unstopt
verbalexercise
Vittaria lineata
Voortrekker
wage work
westly wind drifting current
winning run
xcvi