Ln the Universe

One might hope that we could warp space time
或许有人希望我们能够扭曲时空
So that one could go off in a rocket and come back in the past
这样我们可以乘坐火箭 回到过去
But I have shown that this is not possible
但我已经证明 如果能量密度不会达到负值
If energy density is always non negative
时间旅行无法实现的
Are we alone in the universe？
宇宙中就只有我们？
Is there alien life out there？
有外星异生物吗？
What is the future of the human race？
人类的未来将会如何？
Up until the 1920s, everyone thought the universe was essentially static and unchanging in the time
所有人都以为宇宙基本上处于稳态，流金岁月，持恒不变
Then it was discovered that the universe was expanding
之后我们发现原来宇宙正在膨胀中
Distant galaxies were moving away from us
辽远星系一直飞离我们
This meant they must have been closer together in the past
这意味着它们必定曾想靠近
If we extrapolate back, we find we must have all been on top of each other about 15 billion years ago
我们若往后推算,就会发现我们必都曾约150亿年前互相堆叠在一起
This was the Big Bang,the beginning of the universe
正是这大爆炸，宇宙之起始
But was there anything before the Big Bang？
然而大爆炸前可有什么吗？
If not,what created the universe？
若是没有,又是什么创造宇宙呢？
Why did the universe emerge frome the Big Bang the way it did？
宇宙为何要从大爆炸中冒出呢？