It's been estimated that there are some 900,000 different kinds of known living insects. At any time,
that there are some 10 quintillion (10,000,000,000,000,000,000) individual insects alive. So if you know of anyone who isn't (or maybe is?) afraid of bugs, here's a good collection of content to round their understanding of
, the study of bugs (not to be confused with etymology, which is the study of words).