Edited by Dava Sobel
![SA Meter April 2021 column.](https://static.scientificamerican.com/sciam/assets/Image/2021/scientificamerican0421-20-I3.jpg)
NOTE: A clerihew is a four-line poetic format invented in 1905 by Edmund Clerihew Bentley, who wrote humorous rhymes about all manner of persons, making frivolous fun of their names. Because Bentley rarely chose scientists as subjects, the author and illustrator seek to fill that gap.