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the claim
Pine cones open through hygroscopic scale movement driven by moisture loss
the verdict
SUPPORTED
the evidence backs this
confidence 86/100

Pine cones open their scales passively via hygroscopic mechanisms driven by moisture loss in dry environmental conditions.

Evidence for · 2
The Structural and Mechanical Basis for Passive‐Hydraulic Pine Cone Actuation
2022 · cited by 46
The study confirms that pine cone scales bend passively through hygroscopic behavior in response to environmental humidity changes.
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More for · 1
Pinecone-Inspired Humidity-Responsive Paper Actuators with Bilayer Structure
2024 · cited by 10
The paper notes that pinecones open their scales at low humidity due to specific bilayer structures reacting to moisture.
The paper trail · every fact has a biography
first checked01 Aug 2026
judged → SUPPORTED · 8601 Aug 2026
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