A sample evolution run and its study 

This page describes a study of one of many speed-oriented evolution runs. Studying evolution is possible because the simulator can periodically save a gene pool state. Thus we keep track of changes in populations during the evolutionary process. Sometimes it is hard to find the first species with some property, because such a species is usually created between saved "snapshots". This is analogous to the problems of biologists examining fossil records and the punctuated equilibrium phenomenon.

Note that this experiment was performed a long time ago and now the following creatures would behave differently due to improvements in simulation. However, you can see their original movement in this video: 5.5 MB. Refer to the publications to read in detail about current research and results.

One of the first species which had a moving leg controlled by a touch (T) receptor. You can find parts of the older ways of locomotion in its genotype. It does not move efficiently, in fact it is merely creeping.

Name: Owohyw Ris
Genotype: rrCCii(rXX[| T :379.564],r(rXX[@ 0 :-3.182][| G :1.749],X[| 0 :-135.911,G :0.878]),X)
Avg. horizontal speed: 0.002

After some evolution: the construction and neural network have been cleared from redundant parts. Still not very stable, sometimes drags its "head" on the ground.

Name: Owypes Ir
Genotype: rCCirCCii(rXX[| T :379.564],rrX,X)
Avg. horizontal speed: 0.006

A bit improved: walking. One neuron, one receptor, one muscle. Touching the ground with the receptor causes bending of a leg. The leg is straightened when the receptor does not touch anything.

Quite a good, one-leg creature. The control system has been changed during the evolution, the leg was elongated, the organism is more stable, has some redundant neurons.

Name: Emucep It
Genotype: ((rrrLCCCCCFMssswXX[@ 1 :0.064][| T :761.506,1 :3.962,0 :1.984,0 :1.382],),X,LLMX[@ / :-2.806,0 :834.492])
Avg. horizontal speed: 0.017

The first creature with two "legs"! Their coordination is very poor, although the creature is faster than the one with single leg only.
Name: Opecek Ytisi
Genotype: (,,MX[@ 1 :-4.017][ 5 :-539.560,G :2.916][ 4 :2.453,4:0.334](LCCMw(rrrLCFFssssssXFX[| -1 :-4.817][ -3 :1.703][| T :496.146,1:-2.326,-4 :-4.752],fX,),rrrrLLLLLLCCCCC(rrrLLCCCFFMsssssswXFX[| -1:-4.817][ -3 :1.703][| T :496.146,1 :-2.326,-4 :0.337],fX,),rrwX[ 0:1.632,* :1.533,-1 :-792.298]))
Avg. horizontal speed: 0.03

After some evolution: the best two-legged creature. Now the coordination of legs is perfect: one is pushing back, the other is pulling.

Name: Ynened Ycisi
Genotype: (,rLMX[ 7 :2.769,! :1.000](LCCMMw(rrrLCFFssssssX[ @0 :-1.132,*:-2.232]CFX[ @! :0.137][| -3 :-2.220][ |/ :-0.823,-2 :0.967,* :1.697][| T:407.734],RcfX,),rrrrrrrLLLLCCCCCCCMsssssswXFX[ ! :1.000][| -2 :-4.430,G:-0.840][ -1 :-3.255],fWXwX[ @! :1.000]))
Avg. horizontal speed: 0.045