| Answer | Crossword Clue |
|---|---|
| astrobiology | exobiology |
| SAGAN | Exobiology pioneer |
| astrobiologies | ASTROBIOLOGY, exobiology |
| exobiological | relating to exobiology |
| exobiologist | a student of exobiology |
| exobiologists | EXOBIOLOGIST, a student of exobiology |
| exobiologies | EXOBIOLOGY, the study of extraterrestrial life |
