UNDERFOOT NOTES / Sheet 1 of ∞ / Scale 1:1 boots
Clear answers about the ground we walk on, from pebbles to plate boundaries.
surveyor: Writer, Matter
Rewi writes about what rocks and water are made of, and why they behave the way they do when they freeze, crack or crumble. Most of his thinking happens at the kitchen table with a pot of tea and a patient dog, and he is happy to admit when a first guess was wrong.
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16 January 2026 · 12 min
Water is one of the few common substances that takes up more room as a solid than as a liquid. That oddity is why a forgotten jar splits in the freezer, and why frost slowly pries cliffs, roads and mountain slopes apart.