So Petroleo improved tango and thus it evolved. About when did this all happen? -----Original Message----- From: tango-l-bounces at mit.edu [mailto:tango-l-bounces at mit.edu] On Behalf Of Joe Grohens Sent: Wednesday, 3 December 2008 6:31 AM To: tango-l at mit.edu Cc: Joe Grohens Subject: [Tango-L] Tango Pedantics