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A first-person report from the Qualia Research Institute's research retreat describes how 5-MeO-DMT appeared to cancel the Ebbinghaus illusion, suggesting psychedelics may occasionally enhance literal perceptual accuracy rather than only distorting vision.
A new Nature paper explains how butterfly wing patterns combined with flight dynamics create a "motion dazzle" illusion, disrupting predators' ability to gauge speed and direction and helping butterflies evade attacks.