火星生命

AMERICAN STORIES - A Princess of Mars, Part Four By Edgar Rice Burroughs Broadcast: Saturday, June 25, 2005 ANNOUNCER: Now, the Special English program, American Stories. (MUSIC) ANNOUNCER: Welcome to

发表于:2018-11-27 / 阅读(371) / 评论(0) 分类 American Stories

Astronaut: Light gray, material on either side. Oh man that's incredible... It seemed to back in the late 60s and early 70s as if America would be a space bearing nation. Plans were big, first the moo

发表于:2018-11-28 / 阅读(259) / 评论(0) 分类 疯狂英语2001年

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.

发表于:2018-12-07 / 阅读(134) / 评论(0) 分类 火星生命

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(157) / 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(127) / 评论(0) 分类 火星生命

In 2001 a new NASA probe was launched. Called Odyssey, it was sent to Mars to carry out the most detailed analysis ever of the planet’s surface. What it has discovered may be about to answer one of

发表于:2018-12-07 / 阅读(118) / 评论(0) 分类 火星生命

But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough

发表于:2018-12-07 / 阅读(116) / 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(145) / 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(154) / 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(144) / 评论(0) 分类 火星生命

《美国恐怖故事畸形秀》第四季没有前三季那么黑暗,但是依旧那么血腥,当然也少不了性和暴力的元素,看了第一集,诡异的风格,梦幻的色调,还有复古的服装和怀旧的歌曲。两个头、三

发表于:2018-12-18 / 阅读(100) / 评论(0) 分类 英乐时空

Believe it or not, astrobiologist Penny Boston is searching for life on Mars by dropping deep into this heart of darkness. This is a lava tube, a subterranean cave formed by underground lava flows during volcanic eruptions that occurred thousands of

发表于:2018-12-30 / 阅读(208) / 评论(0) 分类 国家地理2007年

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(136) / 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(153) / 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(142) / 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(165) / 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(173) / 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(170) / 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(157) / 评论(0) 分类 火星生命

Mars Rover Finds Evidence of Ancient Sea David McAlary The U.S. space agency NASA says Mars once had a shallow, salty sea that could have supported life. The evidence has come from chemical and physic

发表于:2019-01-04 / 阅读(114) / 评论(0) 分类 VOA2004(上)--各类新闻
学英语单词
abacas
absentia lanyuensis
aerial lighthouse
Alphalin
ammonium acid sulfate
assertions
Baekje
basetllyrin
biaxial mineral
break-up of trains
bullet probe
capacitance hygrometer
centrifugal pump impeller
chain splice
close-sets
collar mark
counter-parties
curbstone seal
datestamp
delitous
direct-action
DO group
Doran L.
dreamwork
duns-scotus
echinococcotomy
efferent nerves
enneapterygius etheostomus
evaporator element
false biliary ducts
fetal tachycardia
fluid-fuelled reactor
Fragaria chiloensis Duch.
geb
gel filtration chromatograph
Glenboro
gravitational fractionation
Guidiguis
hammerheaded
hydrolytic degradation
imitableness
intercourse between heart and kidney
interocellar spine
Ionian
item master
linear-circular correlation
litter meadow
low neutron leakage fuel management
mazquf
memogate
mid-shot
middle carpenter file
monaminuria
nollans
non sensory
nonhomologus synapomorphy
nonprosodic
Nāndghāt
on line refuelling
on-line mass storage
parametron core
piperonyloyl
plant-mixed material
posterior membranous ampulla
postulary
proportioning bin
pseudopodlike
public interests
pupillary margin
quartary
racey
real sequence
relaxation-based
rewrit
secondary virginity
sensitive indicator
shoup
signaled course
simple mixed-strategy
simultaneous iterative
sintered ore
spaniocelyphus dentatus
special resistance
standard output device
stationary cataract
surveillanced object
tandem engine
tappet rod
tharos
theory lower-bound
theory of correspondent inference
transparent assembly
TRAPATT
true carry
underdolven
untwight
vertical boiler with horizontal water tubes
vertical disintegration
wall garden
wappen
wind angle
worders' management