That's of great interest to me that your uncle was not harmed by the DDT. I'm familiar with Rachel Carson and her fight against the use of DDT post-WW II. Your uncle perhaps had good protocols going on in his life -- raised his own food?....good mental/spiritual outlook....hard worker/effective perspiration (eliminate toxins).....no pharmaceutical drugs (stressing his liver)..... Other things? Thanks for sharing. His life was a blessed one.