I would say that the reasonably recent Mpemba effect definitely applies as one of those "low hanging fruit" you speak of, but yes, to your point, they must be very rare those which still exist.,(reply>), A ~2370 year old discovery? :),(reply>), @Leander M IF it can't be replicated in impressively accurate lab conditions then it doesn't exist. Also if it did, thermodynamics would have a real rough time.,(reply>), @and ? Its not always replicable, and it differs a lot, but I wouldnt call it nonsense, if it exists, its gotta be a really miniscule effect,(reply>), @Tösel Treps would it balls?,(reply>), @UnusedUsername01 It's not a real thing. It's a myth. It would be easy to prove scientifically in a lab, the fact it hasn't been over several decades indicates it's nonsense.