# Experiment: Earth

The **Earth experiment** is one of 12 experiments in the laboratory, available at laboratory tier 3.

The goal of the Earth Experiment is to get a certain amount of density.

## Mechanic

Drills dig up earth, upgrades collect earth faster. Additional drills can be purchased. Upgrades and drills cost increase exponentially.

Compression reduces volume/diameter and raises density. Stability can be reduced depends on compression mode, if the stability depletes to 0% the experiment will be stopped and have to be reset.

The density will eventually reach a maximum, at 80 * (4/3)^{3*log3mass}, which is approx. 80 * mass^{0.78557852143}. This means to get all the modules, you must have at least **2.7e7**kg mass, and to complete all goals, you must have at least **8.92e12**kg mass.

### Compression modes

**Slow & Safe**: Drills get slower the higher compression rate gets (stopped at maximum rate), slow compression but won't reduce stability.**Quick & Dangerous**: Drills can continue normally regardless the compression rate, very fast compression but drains stability**Stabilize**: Only increases stability and slows down the drills.

### Prestige

Prestige resets all your drills, mass and diameter and will require you to have a certain amount of mass drilled. You must choose between 2 bonuses:

**-20% Stability loss & +10% stability gain**: Reduces the stability loss when using Quick & Dangerous compression mode and Stabilize mode will increases stability more quickly**+30% Compressor React & +5% Drillpower**: Increases the compressor reaction (the compressor will reach higher compression rate faster) and increases amount of mass drilled