Reverse the film of our universe's history, and things seems to get mighty strange in the last reel. What began in physical harmony, propitious for planets, humans and domestic appliances, has reverted to hell: temperatures hotter than the sun's core, an exoti...
What Came before the Big Bang? 来自 Nature 喜欢 0 阅读量: 37 作者: M Bojowald 摘要: Was the Universe before the Big Bang of classical nature, described well by a smooth space–time? Or was it in a highly fluctuating quantum state? This is one of the most basic questions that we ...
Yougaingreaterconfidenceinyourself.Also,youbecomemoreoptimisticandcalmerinthemindthanbefore.Thereareseveralreasonsforthesechanges:yourself-imageimprovesasyoustartlivingintidybeautifulrooms,andyougaindecision-makingskillsasyoucontinuetochoosebetweenwhichthingstothroworgiveawayandwhichtokeep.ThewayweletgoofthingsintheKo...
passengersshe?dnevermetbefore,tobeginthe journeytowards Antarctica.“From seeing the wildlifetowitnessingsunrises,thewholeexperiencewasamazing.Antarcticaleftanimpression onmethatnootherplacehas,”Ginnisays.“IrememberthefirsttimeIsawahumpbackwhale;it justroseoutofthewaterlikesomeprehistoric creatureandIthoughtitwas...
But what came before? Physicists such as Stephen Hawking tried to restore a kind of timelessness by getting rid of that starting point, imagining a universe with no clear “bang.” You can wind back the clock to the edges of those first moments of existence, but asking what came before ...
But planetologists have discovered that Earth's very presence in this Goldilocks zone is itself due to an amazing stroke of luck. When the Solar System was still young, this zone came close to being taken over by the planet Jupiter.但行星学家发现，地球出现在这片“宜居带”本身就有惊人的...
Scientists now think that a large proportion of these molecules came from outside planet Earth. Comets and asteroids could be the missing links of a long chain.科学家们现在认为，这些分子中有很大一部分来自地球以外的星球。彗星和小行星可能是生命的长链中缺失的环节。The chain began with the simple ...
M: Well, I came out here aiming for the gold. I got third place last time, and it was not the result I had hoped for. W: What happened today? You were looking extremely good at the start. M: I blew it! The car was a bit out of control. W: Some people might have given up...
②The team has bonded together well.(vi.增强信任关系) ③The experience created a very special bond between us.(n.纽带;关系) 三、知识要点 1.set sail 起航;开航 We set sail at high tide. 我们在涨潮时启航。 [例2]The ...
When cosmic inflation came to a sudden and still-mysterious end, the more classic descriptions of the Big Bang took hold. A flood of matter and radiation, known as "reheating," began populating our universe with the stuff we know today: particles, atoms, the stuff that would become stars ...