Ive heard stories of the world ending in 1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008 so on, and now 2012, and 2050.
My question is how do scientists know that this will happen, cause apparently they have been wrong atleast 20 times already...