Author and astrophysicist Neil deGrasse Tyson dismisses the popular internet doomsday theory that a "Planet X," aka Nibiru, will return to our solar system in 2012 and fatally disrupt the Earth's orbit -- a claim Tyson describes as a "marvelous work of fiction."
Neil deGrasse Tyson - World to End In 2012...or Not
[clip from Mr. Tyson's 'The Pluto Files' video]
Neil deGrasse Tyson: The Pluto Files
"Third graders and astrologers are REALLY pissed off at Pluto's demotion . . . . "