| extinct species | 1.45 | What if we could bring back extinct species? | ||
| extinct volcano | 1.45 | The atoll is the rim of an extinct volcano. | ||
| extinct animal | 0.92 | A fossil is an extinct animal. | ||
| extinct creature | 0.59 | Dinner, in the entrance hall, was dominated by three more extinct creatures. | ||
| extinct bird | 0.26 | An extinct bird or animal cannot be recreated. |