system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can insects fall from proportionally insane heights and suffer no damage?
gpt
Put simply, if you make something twice as big, it weighs EIGHT TIMES as much. If you go in the other direction (making something half as big), then it weighs 1/8 what it did before. So you can see that something that's REALLY small will weigh almost nothing. 

Also, for really small things like insects, air acts like it's pretty thick. All those legs and body pieces slow them down, sort of like a parachute.

Insects don't weigh much, and the air slows them down quite a bit. That's why humans fall like a rock and insects sort of don't. 

EDIT: More infos, gathered up from the comments.

They say falling doesn't kill you--its the sudden stop at the end. While ants top out at about 4mph in freefall (and humans go on to 125mph or more), what really saves their bacon is being so light. Since they weigh so little, there's a lot less of them that has to be slowed down when their little anty body hits the ground.