Tom Whitwell's annual collection of 52 fascinating facts returns, featuring expensive calculators and trademarked scents

Music Thing Modular Workshop System

For the last several years, Tom Whitwell, has written an annual list of 52 things he's learned that year. He just posted his new one.

Here are five samples:

There are just 16 trademarked scents in the US, including Crayola crayons, Playdoh, an ocean-scented soft play in Indiana and a type of gun cleaner that smells of am…