In the late 1960s I read a story about graduate students studying entomology going to a distant planet that was much like Earth but the insects that lived there were different. But they were nonetheless insects.
One of the students bore the first name "Kip". If I recall correctly, they stayed in the house of a woman who told them that insects of a certain species on that planet were "a dime a dozen" (i.e. very numerous). Each of them had a leave of absence from some university so they could make that trip, and that was where I first encountered the term "leave of absence".
