One letter separates microscopic misery from prehistoric majesty! On the left, we have Diplococcus (now actually called Neisseria), a bacterial terror responsible for some truly uncomfortable doctor visits. On the right, the majestic Diplodocus, whose only crime was having a ridiculously long neck and being extinct for 145 million years. Just remember: if your date mentions they're interested in "Diplo," make sure to clarify which one they're talking about. The consequences of confusion could be... significant.