可能
If time travel is possible, where are the tourists from the future?
I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.
I think it would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.
Nothing is impossible, the word itself says I'm possible’!
Nothing is impossible, the word itself says 'I'm possible'!