Share this postIserotope Extras - Issue #27articleclub.substack.comCopy linkFacebookEmailNoteOtherIserotope Extras - Issue #27Mark IseroJan 21, 2016∙ PaidShare this postIserotope Extras - Issue #27articleclub.substack.comCopy linkFacebookEmailNoteOtherShareThis post is for paid subscribersSubscribeAlready a paid subscriber? Sign in