人生若只如初見

( just found a passage that i've writen on xanga private on 17/3 which was quite interesting, didn't post that out becoz… well, sb very important to me read xanga and i really dun wanna make myself freaky:P)

you guys know that whoever i encountered in astron field(or those seem to be interested), i'd ask one question: why we should search for oxygen for extra-terrestrial living things, and also, why carbon base but not the others? usually i don't get a gd ans (or i simply don't have their knowledge to understand…) so again i caught my astron professor and asked: why?

he frowned and looked at me seriously, “in fact you are right. the way you are thinking is right. but what is your definition of 'living things'?” then i knew the answers. he continued, “the definition of living things is too broad that human beings cannot have a target in the outer-space. so we have to limit the definition of “living things” into oxygen depending, carbon-based life form. in fact there can be silicon-based life-form…”

i asked him, wt about the UV or other radiation which is stronger, can there be anything living in areas/planets with strong radiation? he said,”well, yes. 1stly, there can be a completely different biological structure which can withstand the UV like wt we do for visible light, 2ndly, they may build up shells to protect themselves against UV. in fact, there are living things on Earth like that… cockroaches. cockroach's shell in fact can protect them from the UV, so human beings are more likely to die before the cockroaches if anything happens to Earth…” then he talked about cockroaches…

so ging!!!