Richard Davidson tested around 16 long-term meditators with brain scanners in his lab, and wrote a PNAS paper about it: https://pubmed.ncbi.nlm.nih.gov/15534199/ There is a joke among scientists that PNAS means “Post Nature And Science” or in other word: rejected by nature and Science. Then, Richard Davidson wrote his best-seller “Altered Traits”, where he describes the …