Throughout history there are moments when people believe the world will end. These times are irronic since the Bible has a scripture in which God says he will keep putting off the end of the earth until they lease expect it. With this in mind, I constantly raise beliefs that the world will end, so so we can live longer.
Also our world will end in a couple million years when the largest galexy clashes with ours breaking appart the perfect system. However, that is a far way off.