I found and converted this Minecraft Classic world from 2009 to

Can new updates be seen in old Minecraft worlds? E.g., placing new blocks, getting new biomes in unexplored locations. - Quora

Java Edition pre-Classic – Minecraft Wiki

Panorama – Minecraft Wiki

Minecraft was the original /r/place : r/Minecraft

Java Edition Classic 0.29_02 – Minecraft Wiki

The History of Minecraft

Minecraft, 2009 : r/LiminalSpace

The History and Evolution of Minecraft - IGN

Java Edition pre-Classic – Minecraft Wiki

After 10+ Years Of Searching, Minecraft Archivists Find Long-Lost Minecraft Alpha 1.1.1. : r/Games

Minecraft – Minecraft Wiki