20 years ago, scientific superstar Carl Sagan urged us to use our brains - to be actively skeptical. Link http://nofrakkingconsensus.com/2014/02/24/skepticism-used-to-be-a-scientific-vi… Tags Books ethical & philosophical free speech historical perspective Carl Sagan Gro Harlem Brundtland intellectual freedom John Kerry Kevin Rudd Natalie Bennett Robert Tracinski Steven Goddard Source Donna Laframboise