Students are not free in the universe, but a "past life".

<P Align=center> </ P> <P align=center> spatial scale in the universe rebounded in the schematic diagram </ P> <P align=center> </ P> <P align=center> the universe through the precision of human .telescope when the universe was born scene </ P> World Scientific reports [tech.] news: a theoretical physicist, said the United States, according to his establishment of a new mathematical model of time and space, our universe is not born out of nothing, it .a "past life." .<P Align=left> Under the existing theory, scientists generally believed that the birth of the universe is 13.7 billion years ago, this is known as the Big Bang event is the starting point of everything, including time and space. .But the United States theoretical physicist at Pennsylvania State University 马丁波乔瓦 Stewart in the new issue of "Nature Physics" published a paper that the big bang is not the time to start..波乔瓦尔德 said, models show that the moment the big bang, our universe is very small but not small enough to zero. .</ P> <P align=left> model also shows the big bang the universe is likely to be the demise of the previous triggered. .And the accelerating expansion of the universe we are different, before the start of the Big Bang, the universe of "past life" a contraction. .According to calculations, the gravitational energy savings is very large, the universe to a certain degree of shrinkage will occur after the "big bounce", just as the ball hit the ground heavily after the will bounce back..波乔瓦尔德 that the "big bounce" triggered the current expansion of the universe, in our universe, there are likely to find their "past life" left behind. .</ P> <P align=left> this model means that the big bang is not the time, the universe may have infinite past and future. .</ P> <P align=left> but some experts believe that 波乔瓦尔德 of this hypothesis remains untested. .</ P> </ p>.