|Image credit: me.|
Appearing as a hovering, wraith-like vision above the Cornell University Physics Building where he taught for years, the ghost of recently deceased astronomer/author Carl Sagan warned former colleagues Monday against a belief in superstition. "Exercise skepticism!" Sagan said, clanking a large metal chain. "Whenever possible, there must be independent confirmation of all facts pertaining to any so-called 'magical' or 'mystical' event or phenomenon!"
Hat tip to Dustin Hildebrandt.
Edit: As the previous Ghost Sagan picture was rife with compression artefacts, I replaced it with a much nicer PNG version, above. You can find the original here.