← Back to the Physarum experiment

Physarum: birth of a network

Completed
Seed
42
Steps
2000 / 2000
Created
26 July 2026 at 06:49
Finished
26 July 2026 at 06:50

Hypothesis

With no memory or plan, thousands of agents weave a self-optimizing transport network through stigmergy

Vital signs

Network contrast0.50
0.150.370.59step 10step 2000 step 10 : 0.18 step 340 : 0.45 step 670 : 0.47 step 1000 : 0.46 step 1330 : 0.48 step 1660 : 0.51 step 1990 : 0.47 step 2000 : 0.50
View data
Network contrast by step
StepNetwork contrast
100.18
200.18
300.18
400.19
500.20
600.20
700.21
800.22
900.23
1000.23
1100.24
1200.28
1300.28
1400.30
1500.31
1600.33
1700.35
1800.35
1900.37
2000.39
2100.38
2200.40
2300.41
2400.40
2500.43
2600.43
2700.44
2800.44
2900.46
3000.45
3100.46
3200.45
3300.46
3400.45
3500.48
3600.45
3700.45
3800.47
3900.47
4000.47
4100.46
4200.47
4300.46
4400.46
4500.47
4600.47
4700.47
4800.47
4900.47
5000.46
5100.48
5200.50
5300.50
5400.50
5500.54
5600.52
5700.52
5800.48
5900.48
6000.48
6100.46
6200.47
6300.46
6400.46
6500.45
6600.46
6700.47
6800.47
6900.50
7000.50
7100.49
7200.49
7300.48
7400.49
7500.46
7600.45
7700.46
7800.46
7900.45
8000.45
8100.46
8200.47
8300.44
8400.45
8500.44
8600.46
8700.47
8800.47
8900.48
9000.48
9100.50
9200.47
9300.48
9400.47
9500.50
9600.47
9700.48
9800.48
9900.49
10000.46
10100.48
10200.48
10300.47
10400.48
10500.51
10600.52
10700.51
10800.48
10900.49
11000.50
11100.49
11200.48
11300.50
11400.50
11500.49
11600.50
11700.48
11800.47
11900.47
12000.49
12100.48
12200.47
12300.47
12400.47
12500.44
12600.48
12700.46
12800.46
12900.43
13000.45
13100.46
13200.48
13300.48
13400.46
13500.47
13600.48
13700.50
13800.53
13900.53
14000.53
14100.53
14200.52
14300.54
14400.53
14500.56
14600.52
14700.51
14800.52
14900.50
15000.51
15100.49
15200.50
15300.48
15400.48
15500.50
15600.50
15700.51
15800.50
15900.51
16000.49
16100.49
16200.49
16300.50
16400.51
16500.52
16600.51
16700.51
16800.49
16900.49
17000.50
17100.49
17200.49
17300.48
17400.46
17500.48
17600.47
17700.47
17800.49
17900.50
18000.48
18100.50
18200.49
18300.51
18400.51
18500.51
18600.54
18700.52
18800.50
18900.51
19000.50
19100.48
19200.47
19300.49
19400.48
19500.49
19600.48
19700.47
19800.47
19900.47
20000.50
Coverage0.14
-0.010.070.15step 10step 2000 step 10 : 0.01 step 340 : 0.12 step 670 : 0.13 step 1000 : 0.13 step 1330 : 0.13 step 1660 : 0.14 step 1990 : 0.13 step 2000 : 0.14
View data
Coverage by step
StepCoverage
100.01
200.00
300.01
400.01
500.01
600.01
700.02
800.03
900.03
1000.03
1100.03
1200.05
1300.05
1400.06
1500.07
1600.08
1700.09
1800.09
1900.09
2000.10
2100.10
2200.10
2300.11
2400.10
2500.13
2600.12
2700.12
2800.12
2900.13
3000.12
3100.13
3200.12
3300.14
3400.12
3500.13
3600.12
3700.13
3800.12
3900.13
4000.12
4100.13
4200.13
4300.13
4400.13
4500.13
4600.12
4700.13
4800.13
4900.12
5000.13
5100.13
5200.13
5300.13
5400.14
5500.13
5600.13
5700.13
5800.12
5900.13
6000.13
6100.12
6200.14
6300.13
6400.13
6500.13
6600.12
6700.13
6800.13
6900.13
7000.14
7100.12
7200.13
7300.13
7400.14
7500.12
7600.13
7700.13
7800.13
7900.13
8000.13
8100.12
8200.13
8300.12
8400.12
8500.12
8600.13
8700.12
8800.12
8900.13
9000.12
9100.13
9200.12
9300.13
9400.12
9500.14
9600.12
9700.12
9800.12
9900.12
10000.13
10100.12
10200.13
10300.12
10400.13
10500.12
10600.12
10700.13
10800.13
10900.12
11000.13
11100.12
11200.13
11300.13
11400.13
11500.13
11600.13
11700.12
11800.14
11900.12
12000.13
12100.13
12200.12
12300.13
12400.13
12500.12
12600.13
12700.12
12800.13
12900.12
13000.13
13100.12
13200.13
13300.13
13400.13
13500.13
13600.14
13700.13
13800.12
13900.13
14000.13
14100.13
14200.12
14300.13
14400.12
14500.13
14600.12
14700.13
14800.14
14900.12
15000.13
15100.13
15200.14
15300.13
15400.13
15500.14
15600.13
15700.13
15800.13
15900.13
16000.12
16100.13
16200.13
16300.13
16400.13
16500.13
16600.14
16700.13
16800.13
16900.12
17000.13
17100.12
17200.13
17300.13
17400.13
17500.13
17600.13
17700.13
17800.13
17900.13
18000.13
18100.13
18200.13
18300.13
18400.12
18500.12
18600.14
18700.14
18800.13
18900.13
19000.13
19100.13
19200.13
19300.13
19400.12
19500.14
19600.13
19700.13
19800.13
19900.13
20000.14
Neighbour correlation1.00
0.990.991.00step 10step 2000 step 10 : 0.99 step 340 : 1.00 step 670 : 1.00 step 1000 : 1.00 step 1330 : 1.00 step 1660 : 1.00 step 1990 : 1.00 step 2000 : 1.00
View data
Neighbour correlation by step
StepNeighbour correlation
100.99
200.99
300.99
400.99
500.99
600.99
700.99
801.00
901.00
1001.00
1101.00
1201.00
1301.00
1401.00
1501.00
1601.00
1701.00
1801.00
1901.00
2001.00
2101.00
2201.00
2301.00
2401.00
2501.00
2601.00
2701.00
2801.00
2901.00
3001.00
3101.00
3201.00
3301.00
3401.00
3501.00
3601.00
3701.00
3801.00
3901.00
4001.00
4101.00
4201.00
4301.00
4401.00
4501.00
4601.00
4701.00
4801.00
4901.00
5001.00
5101.00
5201.00
5301.00
5401.00
5501.00
5601.00
5701.00
5801.00
5901.00
6001.00
6101.00
6201.00
6301.00
6401.00
6501.00
6601.00
6701.00
6801.00
6901.00
7001.00
7101.00
7201.00
7301.00
7401.00
7501.00
7601.00
7701.00
7801.00
7901.00
8001.00
8101.00
8201.00
8301.00
8401.00
8501.00
8601.00
8701.00
8801.00
8901.00
9001.00
9101.00
9201.00
9301.00
9401.00
9501.00
9601.00
9701.00
9801.00
9901.00
10001.00
10101.00
10201.00
10301.00
10401.00
10501.00
10601.00
10701.00
10801.00
10901.00
11001.00
11101.00
11201.00
11301.00
11401.00
11501.00
11601.00
11701.00
11801.00
11901.00
12001.00
12101.00
12201.00
12301.00
12401.00
12501.00
12601.00
12701.00
12801.00
12901.00
13001.00
13101.00
13201.00
13301.00
13401.00
13501.00
13601.00
13701.00
13801.00
13901.00
14001.00
14101.00
14201.00
14301.00
14401.00
14501.00
14601.00
14701.00
14801.00
14901.00
15001.00
15101.00
15201.00
15301.00
15401.00
15501.00
15601.00
15701.00
15801.00
15901.00
16001.00
16101.00
16201.00
16301.00
16401.00
16501.00
16601.00
16701.00
16801.00
16901.00
17001.00
17101.00
17201.00
17301.00
17401.00
17501.00
17601.00
17701.00
17801.00
17901.00
18001.00
18101.00
18201.00
18301.00
18401.00
18501.00
18601.00
18701.00
18801.00
18901.00
19001.00
19101.00
19201.00
19301.00
19401.00
19501.00
19601.00
19701.00
19801.00
19901.00
20001.00
Mean trail45.0
28.137.246.3step 10step 2000 step 10 : 29.3 step 340 : 45.0 step 670 : 45.0 step 1000 : 45.0 step 1330 : 45.0 step 1660 : 45.0 step 1990 : 45.0 step 2000 : 45.0
View data
Mean trail by step
StepMean trail
1029.3
2039.5
3043.1
4044.3
5044.8
6044.9
7045.0
8045.0
9045.0
10045.0
11045.0
12045.0
13045.0
14045.0
15045.0
16045.0
17045.0
18045.0
19045.0
20045.0
21045.0
22045.0
23045.0
24045.0
25045.0
26045.0
27045.0
28045.0
29045.0
30045.0
31045.0
32045.0
33045.0
34045.0
35045.0
36045.0
37045.0
38045.0
39045.0
40045.0
41045.0
42045.0
43045.0
44045.0
45045.0
46045.0
47045.0
48045.0
49045.0
50045.0
51045.0
52045.0
53045.0
54045.0
55045.0
56045.0
57045.0
58045.0
59045.0
60045.0
61045.0
62045.0
63045.0
64045.0
65045.0
66045.0
67045.0
68045.0
69045.0
70045.0
71045.0
72045.0
73045.0
74045.0
75045.0
76045.0
77045.0
78045.0
79045.0
80045.0
81045.0
82045.0
83045.0
84045.0
85045.0
86045.0
87045.0
88045.0
89045.0
90045.0
91045.0
92045.0
93045.0
94045.0
95045.0
96045.0
97045.0
98045.0
99045.0
100045.0
101045.0
102045.0
103045.0
104045.0
105045.0
106045.0
107045.0
108045.0
109045.0
110045.0
111045.0
112045.0
113045.0
114045.0
115045.0
116045.0
117045.0
118045.0
119045.0
120045.0
121045.0
122045.0
123045.0
124045.0
125045.0
126045.0
127045.0
128045.0
129045.0
130045.0
131045.0
132045.0
133045.0
134045.0
135045.0
136045.0
137045.0
138045.0
139045.0
140045.0
141045.0
142045.0
143045.0
144045.0
145045.0
146045.0
147045.0
148045.0
149045.0
150045.0
151045.0
152045.0
153045.0
154045.0
155045.0
156045.0
157045.0
158045.0
159045.0
160045.0
161045.0
162045.0
163045.0
164045.0
165045.0
166045.0
167045.0
168045.0
169045.0
170045.0
171045.0
172045.0
173045.0
174045.0
175045.0
176045.0
177045.0
178045.0
179045.0
180045.0
181045.0
182045.0
183045.0
184045.0
185045.0
186045.0
187045.0
188045.0
189045.0
190045.0
191045.0
192045.0
193045.0
194045.0
195045.0
196045.0
197045.0
198045.0
199045.0
200045.0
Spatial entropy2.25 bits
1.552.262.97step 10step 2000 step 10 : 2.59 bits step 340 : 2.38 bits step 670 : 2.48 bits step 1000 : 2.22 bits step 1330 : 2.14 bits step 1660 : 2.25 bits step 1990 : 2.18 bits step 2000 : 2.25 bits
View data
Spatial entropy by step
StepSpatial entropy bits
102.59
202.69
302.75
402.67
502.71
602.76
702.65
802.71
902.77
1002.83
1102.66
1202.75
1302.66
1402.87
1502.65
1602.67
1702.66
1802.33
1902.57
2002.48
2102.44
2202.36
2302.08
2402.37
2502.28
2602.44
2702.36
2802.49
2902.43
3002.26
3102.25
3202.10
3302.56
3402.38
3502.52
3602.75
3702.06
3801.85
3902.05
4001.98
4102.29
4202.15
4302.54
4402.67
4502.33
4601.88
4701.96
4802.14
4902.00
5002.51
5102.08
5202.15
5302.30
5402.07
5501.85
5601.89
5702.03
5801.65
5902.45
6002.46
6102.54
6202.25
6302.32
6402.68
6502.56
6602.44
6702.48
6802.43
6902.24
7002.09
7101.96
7202.16
7302.26
7402.62
7502.46
7602.76
7702.41
7802.52
7902.19
8002.33
8102.32
8202.61
8302.49
8402.27
8502.04
8602.11
8702.02
8802.26
8902.19
9001.82
9101.93
9201.88
9302.11
9402.17
9502.19
9601.71
9701.84
9801.97
9902.08
10002.22
10102.17
10202.33
10301.95
10402.10
10501.70
10601.90
10702.41
10802.24
10901.87
11002.29
11102.14
11202.30
11302.47
11402.44
11501.95
11602.42
11702.40
11802.23
11902.39
12002.39
12101.98
12202.26
12302.55
12402.77
12502.76
12602.56
12702.37
12802.44
12902.44
13002.68
13102.16
13202.34
13302.14
13402.70
13502.37
13602.21
13701.88
13801.94
13901.92
14001.96
14101.88
14201.80
14301.80
14401.87
14501.84
14601.83
14702.17
14802.11
14902.12
15001.94
15102.31
15202.05
15301.94
15402.13
15502.20
15602.09
15701.84
15802.44
15901.96
16001.92
16102.21
16202.05
16301.93
16402.16
16501.92
16602.25
16702.18
16802.45
16902.33
17002.23
17101.99
17202.18
17302.52
17402.56
17502.42
17602.33
17702.52
17802.34
17902.42
18002.17
18102.26
18202.32
18302.27
18401.90
18501.83
18601.68
18702.12
18802.11
18901.74
19002.15
19102.51
19202.71
19302.60
19402.01
19502.26
19602.61
19702.46
19802.26
19902.18
20002.25

Video captures

Configuration

ParameterValue
params{"size":256,"n_agents":65536,"sensor_angle":0.39269908,"sensor_distance":9,"turn_angle":0.78539816,"move_speed":1,"deposit":5,"decay":0.1,"diffuse_weight":1,"coverage_threshold":1.5,"device":"cuda","render_size":512}