| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| sightings of aliens in history | 0.21 | 0.7 | 7613 | 47 |
| first sighting of aliens | 1.62 | 0.7 | 7659 | 6 |
| the first alien sighting | 0.37 | 0.4 | 8744 | 66 |
| when were aliens first sighted | 0.56 | 1 | 6221 | 19 |
| earliest alien sightings recorded | 0.03 | 0.1 | 1973 | 12 |
| first mention of aliens in history | 0.85 | 1 | 7066 | 11 |
| the history of aliens | 1.18 | 0.5 | 4464 | 5 |
| how to find aliens in ancient history | 1.93 | 0.5 | 3877 | 92 |
| history of ancient aliens | 0.09 | 0.6 | 5889 | 95 |
| first alien sighting on record | 1.66 | 0.6 | 6496 | 16 |
| history of aliens and ufos | 0.94 | 0.3 | 8442 | 97 |
| aliens in ancient history art | 0.88 | 0.2 | 7714 | 70 |
| in search of ancient aliens | 0.46 | 0.9 | 6166 | 65 |
| first mention of aliens | 1.63 | 0.8 | 6905 | 54 |
| aliens in historical paintings | 0.63 | 1 | 6853 | 14 |
| ancient aliens on the history channel | 0.89 | 1 | 6049 | 41 |
| has there been any evidence of aliens | 1.74 | 0.7 | 4475 | 14 |
| how long has ancient aliens been on | 0.75 | 0.2 | 4121 | 38 |
| article on ancient aliens | 0.2 | 0.3 | 2234 | 18 |
| when did we start looking for aliens | 1.42 | 0.6 | 3431 | 20 |
| ancient aliens the alien phenomenon | 0.84 | 0.8 | 4300 | 2 |
