Ten Surprising Facts About Everyday Things That You Might Not Know

Why do chocolate bars have wavy lines?

The way most candy bars are covered with chocolate is by being out on a conveyor belt while a veil of wet chocolate covers them. These belts have very specific patterns at the bottom, and as the bars are moving on them, the chocolate starts to cool. As a result, they are left with the pattern of the belts on their bottom side and very often with a less noticeable pattern on the top side.