extraterrestrial threat
C16316
concept
An extraterrestrial threat is any potential danger posed to Earth or humanity by intelligent or non-intelligent life, technology, or phenomena originating beyond our planet.
Observed surface forms (1)
- extraterrestrial anomaly ×1
Instances (2)
-
Dragonriders of Pern
surface form: Thread
- the Shimmer via concept surface "extraterrestrial anomaly"