Sagan was wrong, and highly likely a shill. Extraordinary claim do not require extraordinary evidence - that sets the bar impossibly high, and, which is surely the point, maintains the status quo. Extraordinary claims simply require convincing evidence - er, what's it called... - that's right, science. The 'extraordinary evidence' requirement is pseudo/anti-science, and it tells us all we need to know about scientific orthodoxy, and Sagan. Loved 'Contact' though... Db