Atomic Science 1.12.2-3.2.0b102-UNSTABLE build 102 for 1.12.2 is an alpha file of the Minecraft mod Atomic Science, made for Minecraft 1.12.2. It was published on May 26, 2019 and is 1.5 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 Atomic Science mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.