Last seen in:
- Thomas Joseph - King Feature Syndicate - Jul 27 2024
- Universal - Dec 16 2023
- L.A. Times Daily - Oct 8 2022
- Family Time - Nov 17 2019
- Thomas Joseph - King Feature Syndicate - Aug 6 2019
- Universal - Feb 25 2018
- USA Today - Feb 9 2016
- Thomas Joseph - King Feature Syndicate - Oct 26 2015
- Family Time - Oct 25 2015
- Family Time - Oct 5 2015
Related Clues:
- Most common inert gas in the atmosphere
- Light-bulb gas
- Most common noble gas
- First noble gas discovered
- Hazardous household gas
- Flammable 52 Down
- Dense gas
- Unseen home hazard
- Part of the uranium decay chain
- Alkane used as fuel
- Inert gas used in light bulbs
- An insert gas to groan about
- Inert gas that occurs naturally
- A radioactive gas, symbol Rn
- Naturally occurring inert gas