[Grammar] Need some help,please

[Predator 1987-1990]

Yesterday I was reading a newspaper article and suddenly I found a sentence which threw me into confusion:
"Mr. Pettifer's meteorite is only the fifth meteorite to fall in the UK since the second world war."
Why isn't it written "that has fallen instead of " to fall "?
What is actually the difference?
Here are other similar patterns:
"Mrs. Mae Rose was the first person to see it,last Friday."
(Something makes me think that "who saw it" sounds better)
"The largest animal ever to live on earth-bigger than the dinosaurs-is the blue whale." (If I were the author,I'd wrote it "ever lived" instead of "ever to live")
If there're any rules related to cases such as mine,please let me have them.

And one last thing:
"I blasted their eardrums and they dropped my stuff immediately and made a run for it."
What does "for it" mean at the end of the sentence?
Would the sentence have the same meaning,if "for it" was missed?

I'm looking forward for your answers and explanations.

 

[Tdol]

1 You could write 'that has fallen'
2 Both are fine to me- I can't that one sounds better than the other.
3 If you wanted to use ever lived, you would need to say that ever lived.

 

[Predator 1987-1990]

1 You could write 'that has fallen'
2 Both are fine to me- I can't that one sounds better than the other.
3 If you wanted to use ever lived, you would need to say that ever lived.

Thanks for your reply,but I've wondered if there's some kind of rule,which could explain those examples better.To me it's pretty much confusing when I encounter such examples like above;I just can't explain to myself why this is written in such a way.I've searched anywhere but I haven't found really good explanations..
Now I just feel that this is some kind of journalistic style,completely different from everyday English.
Any advices and corrections are welcome!

 

[Predator 1987-1990]

Could anybody possibly explain to me why it's that?I really can't find any rules relevant to my cases....Once again,please I need to find a solution-help me.