“Forty-one million IQ points. That’s what Dr. David Bellinger determined Americans have collectively forfeited as a result of exposure to lead, mercury, and organophosphate pesticides.” (And it wasn’t like we had a ton of IQ points to spare.) From The Atlantic’s James Hamblin, here’s a look at the toxins that threaten our brains.

+ “Swallowing a little toothpaste while brushing your teeth will make you feel uncomfortable — swallowing 13 tubes of toothpaste will kill you.” Here’s a handy guide: How Not To Kill Yourself With Household Items.