There was a thing not long ago where talcum powder, I think Johnson & Johnson, had some asbestos contamination (asbestos being another mineral that can come from the same mines, apparently). And people were suing because it gave them cancer of the uterus and other internal parts of the female reproductive system. Which makes you go: Wait a second. How the hell does that happen?
That's how.
When I first heard about asbestos in children talc powder, I simply thought it was just one of these "bad pharma" conspiracy theories (there was another one - about asbestos in sanitary towels). It seemed so far-fetched - who in their right mind wouldn't make sure to thoroughly check a product designed to have long-term contact with babies' skin against well-known carcinogenic substance? Well, it turns out this time it happened not in China but right in the heart of the USA.