| Clue | Source | Date |
|---|---|---|
| Bit of light picked up by night-vision goggles | USA Today | 24 Nov 2021 |
| Fish just beyond the visible light spectrum? | Premier Sunday | 27 Oct 2019 |
| Emanation from a heat lamp | USA Today | 29 Dec 2018 |
| Sci-fi blaster | Universal | 02 Sep 2018 |
| Sci-fi blaster | ||
| Emanation from a heat lamp | ||
| Sci-fi weapon, perhaps | Universal | 09 Feb 2016 |
| Sci-fi weapon, perhaps |