Solved cryptogram

Gather all the ozone that shields us from ultraviolet light and it would be a few millimeters thick.

Earth Science Facts, sourced to NOAA Chemical Sciences Laboratory.

Or go to the puzzle’s own page first.

What it means

The layer is not a layer in any everyday sense. Ozone is a trace gas, a few parts per million even where it is thickest, spread through many kilometers of the stratosphere. Squeezed to sea level pressure the whole planetary supply would form a shell about three millimeters deep. That film is what absorbs the shortest ultraviolet wavelengths, which damage DNA directly, and it is why a small percentage change in it matters so much.

The claim comes from NOAA Chemical Sciences Laboratory.

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About as hard as this one

Scored closest to it by the model behind our guide to solving cryptograms.

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Every Earth Science Facts cryptogram · All fact collections

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