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These discoveries raised the stakes. Here was a planet similar to our own. Mars might not have cities or civilizations. But it could be home to other smaller life forms like microbes. Chris McKay is N

发表于:2018-12-07 / 阅读(156) / 评论(0) 分类 火星生命

I think it is exciting. Because it would imply that if life arose independently on Mars. The implication is that life is pervasive throughout the universe. This is why Mars has so obsessed scientists.

发表于:2018-12-07 / 阅读(125) / 评论(0) 分类 火星生命

Rice had seen the same thing in Iceland, one of the few places on Earth with similarities to Mars. It too is extremely cold, and most of the water is frozen into glaciers. And also like Mars, buried u

发表于:2018-12-07 / 阅读(142) / 评论(0) 分类 火星生命

For Mars to have rivers, it must once have had streams, rain, clouds and an atmosphere, a planet just like the Earth today-if these were rivers. They had to be sure. The answers would come in 1998 wit

发表于:2018-12-07 / 阅读(152) / 评论(0) 分类 火星生命

William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in

发表于:2018-12-07 / 阅读(142) / 评论(0) 分类 火星生命

Poems Fog The fog comes on little cat feet. It sits looking. Over harbor and cityon silent haunches and then moves on. By Carl Sandgurg

发表于:2018-12-31 / 阅读(206) / 评论(0) 分类 英语名著名段背诵精华

At five oclock on an August morning, the sun hadnt risen yet, but the Alden family was already up and about. The streetlamps were still on. In a few minutes, the headlights on James Aldens car were on, too. Four sleepy children trooped down the porch

发表于:2018-12-31 / 阅读(171) / 评论(0) 分类 82 The Summer Camp Mystery

Fog Found on Saturn's Moon Titan A study in Astrophysical Journal Letters reveals that Titan may be home to the familiar atmospheric condition known as fog--but made out of methane. Karen Hopkin reports The northeast just had its first big snow of th

发表于:2019-01-02 / 阅读(135) / 评论(0) 分类 60秒科学

Of course, any terraforming is still a long way off. The next few expeditions to Mars will definitely be made by machines. NASA, are sending 2 rovers, capable of travelling over 100 meters a day in se

发表于:2019-01-02 / 阅读(133) / 评论(0) 分类 火星生命

Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t

发表于:2019-01-02 / 阅读(149) / 评论(0) 分类 火星生命

Life on Earth is basically proteins and DNA, so we can wonder if there is life on Mars will also be DNA and proteins, the same type of DNA, the same type of proteins. One might think that DNA is such

发表于:2019-01-02 / 阅读(141) / 评论(0) 分类 火星生命

But there was something even better. Odyssey may not just have found ice. There may also be liquid water, and that means, there could be living creatures there too. Right now, there might be liquid wa

发表于:2019-01-02 / 阅读(164) / 评论(0) 分类 火星生命

But they never got there. The first disappeared into deep space. Another missed its target when its coordinates were confused. One NASA control center was working in metric, the other in feet and inch

发表于:2019-01-02 / 阅读(172) / 评论(0) 分类 火星生命

The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee

发表于:2019-01-02 / 阅读(168) / 评论(0) 分类 火星生命

One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'

发表于:2019-01-02 / 阅读(155) / 评论(0) 分类 火星生命

ARI SHAPIRO, HOST: You might want to get your tissues. The season finale of This Is Us airs tonight. The freshman show has been a surprise hit for its network, NBC, and consistently inspired tears. The show's creator, Dan Fogelman, is getting praise

发表于:2019-01-16 / 阅读(166) / 评论(0) 分类 2017年NPR美国国家公共电台3月

Beginners. Some people say that the weather is changing all over the world. Do you believe that? What do you think? I'm not sure if it is true, but sometimes the local weather does something unusual. Here in Wenatchee, the weather is normally very re

发表于:2019-01-28 / 阅读(112) / 评论(0) 分类 英语博客 A cup of English

URUMQI, Nov. 18 (Xinhua) -- Heavy fog in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, on Sunday left 87 flights delayed or diverted. Twenty-five inbound flights from cities such as Beijing, Dalian and Chengdu to Urumqi have

发表于:2019-02-07 / 阅读(193) / 评论(0) 分类 英语新闻

BEIJING, Jan. 12 (Xinhua) -- Heavy fog enveloped a large swathe of east and central China Saturday, causing highway closures and flight delays in several provinces. Beijing was shrouded in dense smog for a second straight day Saturday. The smoggy wea

发表于:2019-02-08 / 阅读(151) / 评论(0) 分类 英语新闻

BEIJING, Jan. 21 (Xinhua) -- China's meteorological authorities said Monday that central and east China will be shrouded in fog through Tuesday morning. The National Meteorological Center (NMC) issued a blue alert for the fog. Blue is the lowest leve

发表于:2019-02-08 / 阅读(200) / 评论(0) 分类 英语新闻
学英语单词
a gentleman of the press
a-hull
acrocyrtidus longipes
additional party
agnatical
alcandre
angular artery
anisotropic crystal quartz
annual vegetable crop
arch it
attour
barretter
blysopia
capturability
circulating pump system
complete residue system
correlation ratio of Y on X
Corydalis tangutica
declared war
demonstation
ditamine
dojas
Dutch wife
dynamic error
e component
econverse
ed.d
Edda
egg-carrying crab
electrodynamic wattmeter
entropy of liquid
exumbrellar
flat suspended main crown
Flunox
fluorescence photography
gas liquefaction
general surgery
geologic model
glass-to-metal seal
hardts
Hawes
hay crops
Herzogenaurach
Hg conversion
hippocausts
Holbein the Younger
human power evaluation systems
hypothermia therapy
in piece
inter-parliamentary
internal taper
iron-spar (siderite)
knotheads
Kuenlun Mountains
ldk
lead thiocyanide
local automatically operated unit
low pressure detector
lustre sheet
magnespirin
main battle tank
matlin
matrix approach accounting
maxwell-boltzman velocity distribution loaw
Meskol, Pulau
mirror image convention
moving magnet
Mudi
Nitrospan
one-eyed view
optimates
output flange
pairwise orthogonal
pars frontalis capsulae internae
performance scorecard
protonibea diacanthus
pyloroscop
radio frequency capture
rake cooling bed
relative deformation of creep
restoring touque
rhinogobius candidianus
roller weighting
SBT-CO2
semiurban
service signal
spalacine
spindle-cell carcinoma
squeeze machine
store-keeper
surface effect aircraft
Tatarsk
topdown design
Tusilan
two-dimensional superconductor
two-some
vasicentric
wave-path equation
weight-transfer hitch
yin orifice
zodiacl constellations