Physica is the next Minecraft technological mod. It intends to bring back many old, now dead, mods and mix in some new content. Physica is meant to be realistic, but still an enjoyable mod. Physica also contains the core functionality for all the Physica sub-mods.
Seen as a whole Physica is a Minecraft Mod focused around science and technology that introduces many new machines/blocks and items into the game.