Solved cryptogram
Your brain is a small share of your weight and takes a fifth of the energy your body burns.
Biology Facts, sourced to PNAS.
What it means
It accounts for around two percent of body mass and roughly twenty percent of resting energy use, and the consumption barely changes between hard thinking and daydreaming. Most of that budget goes on maintaining the electrical gradients across neuron membranes, which is the standing cost of being ready to fire rather than the cost of any particular thought.
The claim comes from PNAS, and the page it comes from was read on 2026-08-27 to confirm it still says this.
This is not the kind of claim that goes out of date, which is why it was set as a puzzle rather than a fact with a shelf life.
Solve it yourself
This fact is a cryptogram here: 72 letters over 19 different ones, graded medium.
- SourcePNAS
- CollectionBiology Facts
- Difficultymedium
- Length72 letters, 19 of them different
Nearby in the collection
The facts either side of this one.
- MedlinePlusmedium, 69 letters
- MedlinePlusmedium, 68 letters
- Frontiers in Psychologymedium, 68 letters
- Brain Research Bulletineasy, 74 letters
About as hard as this one
Scored closest to it by the model behind our guide to solving cryptograms.
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