| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| theory of panspermia was proposed by | 0.05 | 0.4 | 6555 | 99 | 36 |
| theory | 0.53 | 0.6 | 3249 | 67 | 6 |
| of | 0.07 | 0.3 | 1972 | 19 | 2 |
| panspermia | 1.51 | 0.6 | 7975 | 58 | 10 |
| was | 0.23 | 1 | 269 | 20 | 3 |
| proposed | 0.97 | 0.8 | 8115 | 79 | 8 |
| by | 0.94 | 1 | 4733 | 79 | 2 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| theory of panspermia was proposed by | 0.8 | 0.3 | 1509 | 28 |
