Experiment: Neutral
The Neutral experiment is one of 12 experiments in the laboratory, available when the laboratory is first built.
The goal of the neutral experiment is to expand a sphere.
Mechanic
Upgrades increases how fast the sphere grows. Each tier of upgrades costs more, but also expands the sphere faster. When you buy enough of a single tier, the base rate of that tier will also increase.
Expanding converts current growth into maximum growth, which resets the sphere back to size 0.
Upgrade  Base rate  Cost 

Essencer  0.1/s  1 * triangle(lvl) * 2^{prestige}

Combiner  0.5/s  10 * triangle(lvl) * 2^{prestige}

Dragger  1.5/s  50 * triangle(lvl) * 2^{prestige}

Forcer  4/s  150 * triangle(lvl) * 2^{prestige}

Purer  10/s  500 * triangle(lvl) * 2^{prestige}

Condenser  50/s  2000 * triangle(lvl) * 2^{prestige}

where triangle(lvl) = lvl*(lvl+1)/2 + 1
.
As you buy more upgrades in a tier, the base rate of that tier starts getting multiplied based on how many upgrades you've bought. This makes it better to focus on a single tier, rather than spreading your upgrades among all the tiers. The multipliers follow a simple pattern, until it switches at high amounts:
Count  Rate multiplier 

0  1x 
10  2x 
15  4x 
20  8x 
50  16x 
100  32x 
150  64x 
200  128x 
500  256x 
1000  512x 
2000+  2^(8.8+0.2*floor(count/1000)) x

The purchase limit for each component (without any purchase limit prestige upgrades) is as follows:
Component  Purchase Limit 

Essencer  60000 
Combiner  50000 
Dragger  40000 
Forcer  30000 
Purer  20000 
Condenser  10000 
Prestige
Prestige resets all generators and your maximum orbs to the square root of your current maximum orbs (capped at 10) and you have to choose between 2 bonuses.
 Production x2  generators will produce orbs twice as much
 +5% max. Level (multiplicative)  increases the maximum levels by 5% of the previous maximum amount
Prestige becomes available when the orb size reaches a certain threshold. The threshold increases based on number of prestiges. Threshold formula needed
Because of the exponential nature of the bonus rate increase, the +5% max level quickly starts giving more than 2x production, and this just gets more pronounced the more you keep taking it.
This means that it is recommended to first start putting points into the 2x upgrade and later reset and swap all points to the x1.05 upgrade.