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Updated: Feb 16, 2026

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Planarian Scrunching as a Quantitative Behavioral Readout for Noxious Stimuli Sensing
Published on: July 30, 2020
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Bipolarity in planarians is not induced by space travel
Ronald Sluys1, Giacinta A Stocchino2
1Naturalis Biodiversity Center PO Box 95172 300 RA Leiden The Netherlands.
Regeneration (Oxford, England)
|January 5, 2018
Abstract:
Available evidence strongly suggests that alternative, Earth-bound explanations should be sought first for the occurrence of a single bipolar planarian flatworm returning from space travel. Double-headed worms have been amply documented as arising under experimental conditions as well as spontaneously in stock cultures of planarians.
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