Hi Steem Friends!
I really have a good sense of humor. Most especially when I found it interesting on "WHY's". I found this shocking Meme that gives us hint on why we can't easily kill a fly.
We're all annoyed by the buzzing sound and felt disgusted when we saw one, then what if there's more of them hahahahaha.
And I know, you know the answer to the question. It has two big compound eyes and there's more if you zoom in.
The most interesting part is, it has 360 angle of sight. And now, the great part that answers "why we can't easily kill" them... is with this simple reason aside from having more eyes is.
Yep! You won't believe it. They have "sharingans" hahahahahahaaha Now you know.
Source: https://goo.gl/EGbNu2