Iamon lyme: All sorts.. From Christian preachers making a mint on predicting the second coming to people believing we are about to be hit by a rogue planet.... ... That months/years before it'd been easy to see unaided such a rogue planet is of no matter to their belief.

.. I worked for one company years back who were hired to check that computers their contractors used not going to have a logic hiccup through not enough date storage bits... One guy working at the company believed that even toasters were going to be affected by this ""Y2K"" problem.

..... Still some people believe the world is flat..... Mind is a powerful device that can get hard wired as well as software errors that create false reality.

This is an old known problem.

As to the world ending.... About 6 billion years or more when the sun goes into it's red giant stage as the star starts to die.