Your teeth contain traces of strontium isotopes that can reveal where you lived while they were forming.
TIL: Strontium is how dentists and anthropologists track you. I am currently covering my teeth with aluminum and licking a 9 volt battery. They will never find me (bzzt)
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TIL: Strontium is how dentists and anthropologists track you. I am currently covering my teeth with aluminum and licking a 9 volt battery. They will never find me (bzzt)