Right before Thomas Edison died in his house in New Jersey, he was asked a question: "Were you once scared of anything?" (Not the exact words but you get the idea). He stated that he was afraid of the dark. Perhaps maybe his fear of the dark is what was the driving force and the source of hi determination to invent a light bulb. 

So moral is, if you are scared of something, fix it by inventing an idea to prevent it! ;)
   A really cool yet weird fact is that butterflies taste with their feet! Imagine if human had taste sensors where our feet are... 
   Just so you can picture exactly how they can eat and taste, a picture about the anatomy of a butterfly is below :)