| Era | % Poprawnych |
|---|---|
| kreda | 85%
|
| jura | 82%
|
| mezozoik | 73%
|
| trias | 68%
|
| paleozoik | 66%
|
| kambr | 59%
|
| kenozoik | 59%
|
| czwartorzęd | 56%
|
| karbon | 55%
|
| prekambr | 55%
|
| dewon | 50%
|
| perm | 50%
|
| sylur | 49%
|
| ordowik | 48%
|
| neogen | 43%
|
| paleogen | 41%
|
| holocen | 40%
|
| plejstocen | 40%
|
| archaik | 36%
|
| proterozoik | 28%
|
| fanerozoik | 27%
|