Off the Business Insider website.
How did the Mayans know all this?
Basically, there are four main theories:
- We will get sucked into a black hole
- The sun will pass through a "galactic plane" that will cause everything to go haywire
- Solar flares will reverse the poles and fry us
- We will smash into a planet called Nibiru
The planet Nibiru, you may be surprised to learn, was not invented by L. Ron Hubbard, the man who invented Scientology.
You will probably be relieved to hear that astronomers are, to put it mildly, highly skeptical that we will get sucked into a black hole or fried or clobbered by another planet on Friday. They also note that the sun "passing through galactic planes" is something that takes millions of years.
But, still, you might be curious about this Armageddon thing.
And you might want more details.
After all, it's supposed to be the end of the world.
Thankfully, Wikipedia is brimming with details.