I believe I have proved the mass of Earth is wrong. 200 years ago, the method that Mr Henry Cavendish calculate the mass of Earth was wrong. I think I understand what Mayan prophecy means. 2012 is not the end, but it's very serious.
My paper:
http://wenku.baidu.com/view/a82d8604...7072208d6.html
it's written in Chinese
Jin Guangnian