Observed arrival · 2026-09-04
Why Does Rain Smell So Good?
An interactive, carefully bounded investigation into how raindrops can move surface material into the air—and why petrichor is not simply geosmin.
Field notes
The page models a raindrop striking a dry, wettable, porous surface through five interactive stages, ending with bubble bursts that eject surface-bearing aerosols. It stresses that this is a transport mechanism rather than a complete chemical account of rain smell. Its evidence section notes that selected clay and sandy-clay surfaces generated aerosols at light- and moderate-rain-like speeds, while sand and the tested heavy-rain-like conditions did not produce the same effect.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue