"The world's oldest known habitual drug use can be traced to an island in Indonesia, where ice age hunter-gatherers sucked on betel nuts — palm seeds that contain a neuroactive substance, a new study finds."
https://www.livescience.com/archaeology/worlds-oldest-evidence-of-habitual-drug-use-traced-back-25-000-years-to-indonesia?utm_source=join1440&utm_medium=email&utm_placement=newsletter&user_id=66c4c92f5d78644b3ac5d5b4