Last seen in:
Related Clues:
- Beings from another planet
- Fuzzily photographed craft
- Some sightings
- Craft for 73 Across
- Alien ships
- Astounding Stories subjects
- Martians and Venusians
- Creatures from another planet
- Life-forms assumed to exist beyond Earth
- Foreigners or creatures from outer space
- Strangers, extraterrestrials
- Strangers or extraterrestrials
- Forms of life assumed to exist outside Earth
- Initially, official flying saucers
- Strange forms of life