Assertion: lead pencil's lead | /r/HasProperty | trifled since at least 150 bc
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text: Given that humans have been using lead in various product for over 8,000 years (with the first known mining of it in Anatolia around 6500 BCE), you might be surprised to learn that we have known that lead is dangerous and shouldn’t be trifled with since at least 150 BC, when its effects on the human body were noted by famed Greek physician Nicander of Colophon.