Solved cryptogram
Carbon dioxide is heavier than air, so it settles into cellars and pits and waits there.
Chemistry Facts, sourced to PubChem, National Library of Medicine.
Or go to the puzzle’s own page first.
What it means
It is about half again as dense as air, which matters because the gas has no smell and does not trigger the alarm that makes you gasp. That alarm is set off by carbon dioxide building up in the blood, not by a shortage of oxygen, so an atmosphere that has displaced the oxygen with something else is more dangerous rather than less. Brewery cellars, silage pits and volcanic hollows have all killed people this way.
The claim comes from PubChem, National Library of Medicine.
- SourcePubChem, National Library of Medicine
- CollectionChemistry Facts
- Difficultymedium
- Length71 letters, 17 unique
Nearby in the collection
The facts either side of this one.
- Department of Energymedium, 77 letters
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- NASAhard, 68 letters
- RSCmedium, 76 letters
About as hard as this one
Scored closest to it by the model behind our guide to solving cryptograms.
- RSCmedium, 77 letters
- RSCmedium, 74 letters
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