The Thought of Planet X is quite intriguing, also known as nibiru, Eris,Marduk the destroyer,he Ottawa Object, or Vulcan, or Transpluto, the 10 11 and 12 planet depending who you ask also wormwood "Red or Blue Star by the hopi indians and I am sure that there other. other don't even think its a planet but a brown dwarf (a sun that never ignited)

Many thought that 2003 this planet x was coming to destroy or disrupt out planet but that never came to pass

The theory of planet x is shared by Many ancient civilations
and there are many researchers and astrologers that are dedicated to this Idealism of planet X
see the list below for list of who these individuals and links to there site and research

The mayans sumerians, aztecs, to name a few

the basic idea of is that there is a planet 4 to 7 times the size of earth that has a highly oliptical orbit around the sun, it revolves around the sun every 3600 years and as it comes closer to the sun that is our sun it accelerates and cuts a swath though our planetary system
sometimes causing little damage, other times colliding with planets and moon Causing things like the asteroid belt beyond mars

it has been predicted by a slew of civiliations and prophets that it will return 12.21.2012

The most prodominate of these predictions come from the aztec tribes of south and central americas
You can read more about the aztec tribes mainly the mayans and Sumerians by click on the navigation to the left

scientific proof of this planet has not official, to my knowledge, been proved ... speculated by many
we supposable able to see the planet on feb13 th 2009 from the very southern hemisphere
I find it a strange coincidence that the have just completed a giant telescope in the Antarctic just in the last year