The Nethers Past

The Past of The Nether
The "Nether" is a hell-ish dimension in minecraft, it was first introduced in Alpha 1.2.0, but it came way before that...

Chapter 1: Alpha 1.1
I Was playing alpha 1.1 [for whatever reason] i wanted to see if a nether portal worked, i got obsidian and made a portal, i hit the obsidian, IT WORKED! but the portal was red, the obsidian became red, The grass suddenly around the nether portal turned red and then netherrack! In under a minute, The entire world that i could see of had turned into the nether, Terrain never changed a bit, all grass, dirt, stone and most ore has been turned into solid netherrack.

Chapter 2: Alpha 1.2
So after that i decided to load up Alpha 1.2 where the nether "actually existed" but when i loaded up the world, THE ENTIRE OVERWORLD LOOKED LIKE THE NETHER! all terrain blocks were turned into netherack but placed blocks were still normal. The mobs spawned just like the nether.

Chapter 3: 1.0.0 - Offical release of Minecraft
I Loaded up the same world in 1.0.0 [dont ask me how i did] I was interested in what was there, since nether fortresses were introduced in that era

I loaded the world, ALL PLACED BLOCKS WERE TURNED INTO NETHER BRICK, AND DUE TO NETHER FORTRESSES TRYING TO GENERATE, NETHER CHUNKS GENERATED OVER EXISTING TERRIAN THAT WAS TURNED INTO NETHERRACK, IT HAS CHAOS

Hills cut in half, Random fortresses destroying my house, i even saw a nether fortress in the ocean.

Final Chapter: A shocking discovery.
So i loaded the world in 1.12 and it was completely different. The ocean was dried out, Random fortresses everywhere, i hit F3, The world data biome was "Nether"

I went to gamemode one and went to the world border back and forth, i found a area where the Nether Terrain and Normal terrain met. My world crashed and my minecraft doesnt load the world anymore with current or old versions, i loaded a snapshot for update aquatic and the world was existance, but it was messed up, Water structures generated randomly, my house from the 1.1 alpha was completly destroyed due to nether fortresses and new terrain generating over it, Magma blocks thought they were in the ocean and did the bubble thing, I placed water and it crashed the game and it said

Minecraft.nether Crashed. Minecraft will no longer load and crashes when even trying to open the launcher.