aren't the aliens suppose to be intelligent?

Rating: Null/10 (22 August 2005)

the story's justification, which is narrated at the end, is senseless. it is because if the invading aliens are indeed highly advanced, especially in their warfare technology, then the aliens should have anticipated the kind of environment the earth has. but what happened is that the aliens have died on a simple reason - ENVIRONMENT VULNERABILITY! GIVE US A BREAK! even we human beings studies the kind of environment, which is undeniably filled with perilous - as far as the physical aspect of man is concerned - stuffs (e.g. radiations) there is outside in space before exploring and get ourselves protected and don't end up in the box.
aren't the aliens supposed to be intelligent?