Histories Hidden in the Periodic Table
newyorker.com
newyorker.com
The first test you should do with any unknown substance, yes.
And, thanks to those people's sacrifices, we now get to enjoy good coffee.
Alternatively, if you encounter the cat’s faeces after it got dispersed a bit, it may take a while before you realize that the nicer tasting coffee beans you find went through a cat.
https://books.google.com/books/about/The_Disappearing_Spoon....