mesozoic-0.0.1.jar is an alpha file of the Minecraft mod Mesozoic for Forge, made for Minecraft 1.20.1. It was published on October 5, 2026 and is 360.8 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Mesozoic mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
