Does this taste funny to you?

If you've ever wondered how much mouse poison it would take to kill a human being (and hopefully, such a thought has never occurred to you), Brendan I. Koerner is here to help yet again in Slate's "Explainer" column.

And if you're curious as to why Koerner felt the need to answer such a question, check out this story. A 15-year old Wisconsin kid had tried to kill his family by exactly such a method. The lesson to be learned here? Inspect your coffee grounds carefully.