EQUIVALENT EXCHANGE. www.nytimes.com/2017/01/26/science/so... Ed's site: hes got good advice join list: PoliticsAndStuff (654 subs)Mention History. Ar Follow Ha EQUIVALENT EXCHANGE www nytimes com/2017/01/26/science/so Ed's site: hes got good advice join list: PoliticsAndStuff (654 subs)Mention History Ar Follow Ha