Quantum
by Synthetix
Quantum, a Fabric mod for 1.21.1 by Synthetix, covers science, planetary travel and characters across several themed systems in one install.
What it does
Players can build a life sciences branch that expands the base game with biological content. Characters in the mod have a gender setting, male or female, and belong to age groups. Human entities are included as playable or non-playable figures, and a Quantum Weaver handles the mod's core mechanic. A singularity orb is one of the items that ties these systems together.
The mod also adds a single space rocket and exploration of planets. Destinations include Mars, the Moon, Venus and Mercury, giving the progression a route beyond the overworld. Quantum runs on client and server, so the server and every player need the mod. Files are published for Fabric only, for 1.21.1, under the MIT License, and the code is not open source.
Key features
Life sciences branch
A life sciences addition extends the content of the base game with biological features.
Characters by gender and age
Human entities are sorted by gender, male or female, and by age group.
Quantum Weaver and singularity orb
The Quantum Weaver and the singularity orb form the mod's central items for its main mechanic.
Space rocket and planets
A single space rocket carries players to Mars, the Moon, Venus and Mercury for exploration.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players on Fabric 1.21.1 who want science, space travel and character systems in one mod. Servers need the mod too, because the environment is client and server.
Questions
Which loader does Quantum use?
Does Quantum have to be installed on the server?
In the catalog
Quantum is one of 7,216 Magic mods on ModsFinder, and one of 3,630 Magic mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/quantum-physics
- Owner
- Synthetix
- Published
- 2026-07-27
- Updated on Modrinth
- 2026-08-13
- Facts verified
- 2026-10-15