Across
- 3. Electricity resulting from pressure.
- 5. Based on or consisting of reports or observations of usually unscientific observers.
- 6. Occurring at irregular intervals or only in a few places; scattered or isolated.
- 10. Something difficult or impossible to understand or explain.
- 11. Scandinavian country where Hessdalen is located.
- 12. Difficult to find, catch, or achieve.
- 14. Based on or characterized by the methods and principles of science.
- 17. Emitting or reflecting light; glowing.
- 18. A radioactive gaseous element.
- 19. Mysterious and difficult to understand.
Down
- 1. Valley in Norway known for mysterious lights.
- 2. An ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric charge.
- 4. Originating or existing outside the earth and its atmosphere.
- 7. A formal or systematic examination or inquiry.
- 8. A planned piece of work that is designed to find information about something.
- 9. A system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects.
- 13. Luminous phenomena observed in the sky.
- 14. An instance of seeing something, especially something unusual or rare.
- 15. Unidentified flying object.
- 16. The process of decomposing or rotting.