I'm not endorsing this notion, I'm merely the messenger.
Renowned astrophysicist Carl Sagan once described a "baloney detection kit" a set of tools that skeptical thinkers use to investigate any new concept. A few of the key tools include a healthy distrust of information that isn't independently verified, critically assessing an idea rather than becoming irrationally attached to it simply because it's intriguing, and a preference for simple explanations over wildly speculative ones.
The waxing obsession with the planet Nibiru , which conspiracy theorists say is a planet swinging in from the outskirts of our solar system that is going to crash into Earth and wipe out humanity in 2012 or, in some opinions, 2011 shows that an astonishing number of people "are watching YouTube videos and visiting slick websites with nothing in their skeptical toolkit," in the words of David Morrison, a planetary astronomer at NASA Ames Research Center and senior scientist at the NASA Astrobiology Institute.
Morrison estimates that there are 2 million websites discussing the impending Nibiru-Earth collision. He receives, on average, five email inquiries about Nibiru every day. "At least a once a week I get a message from a young person as young as 11 who says they are ill and/or contemplating suicide because of the coming doomsday," Morrison told Life's Little Mysteries, a sister site to SPACE.com. What's the origin of this mass panic about Nibiru, which astronomers say doesn't exist?A suspect origin
The idea that doomsday will result from a planetary collision was first proposed in 1995 by Nancy Lieder, a self-described "contactee." Lieder claims she has the ability to receive messages through an implant in her brain from aliens in the Zeta Reticuli star system. On her website, ZetaTalk, she stated that she was chosen to warn mankind of an impending planetary collision which would wipe out humanity in May 2003. (When no such cataclysmic event occurred, Lieder's followers chose 2012 as the new date for the Nibiru collision, which coincides neatly with other doomsday prophecies focused on the ending of the Mayan calendar.) [Doomsday Facts (or Fictions)]
Lieder originally called the bringer of doom "Planet X," and later connected it to a planet that was hypothesized to exist by a writer named Zecharia Sitchin in his book "The 12th Planet" (Harper 1976). According to Sitchin (1920-2010), the ancient Sumerians wrote about a giant planet called Nibiru the "twelfth planet" in the solar system, after the other planets (including Pluto), the sun and moon which has an oblong orbit that swings near Earth every 3,600 years. Humans actually evolved on Nibiru, he said, and colonized this planet during a previous flyby.
Link [link to ca.news.yahoo.com