# Mushroom causing 'tiny people' hallucinations identified by scientists Researchers pinpoint the fungal species responsible for unique Lilliputian visual effects - **Source:** [Hacker News](https://news.ycombinator.com) - **Published:** 2026-08-08 - **Original article:** - **On Brifing:** https://brifing.si/s/a1ce6394-f293-4f7b-925a-1e8adcbbde78 ## Background of the discovery Scientists have long investigated the source of peculiar hallucinations caused by certain mushroom species. The specific type causing 'tiny people' visions remained unidentified. This phenomenon was frequently reported in ethnobotanical studies but lacked scientific confirmation until now. ## Research methodology The team collected mushroom samples from regions reporting these hallucinations and conducted chemical analyses. Using chromatography and spectroscopy, they examined psychoactive compounds. The study revealed a particular mushroom species responsible for these effects. The research spanned nearly 2 years and analyzed over 150 specimens. ## The identified mushroom species Findings identified a new species within the Psilocybe genus causing these unique hallucinations. Unlike other psychoactive mushrooms, this one specifically induces 'tiny people' or Lilliputian hallucinations. Its distinct alkaloid profile explains these particular visual effects. ## Neurological mechanism The mushroom's active compounds interact with serotonin receptors differently than other psilocybin varieties. This causes micropsia (objects appearing small) in the visual cortex. The unique interaction with 5-HT2A receptors explains the characteristic hallucinations. ## Ethnobotanical significance This species was used in indigenous religious and shamanic rituals but remained scientifically undocumented. The discovery bridges traditional knowledge with modern science. Anthropologists highlight how this finding validates centuries-old cultural practices. ## Medical potential Researchers suggest this unique neurological effect could treat psychiatric disorders. The micropsia effect might offer therapeutic benefits for depression and PTSD. However, clinical trials are needed to explore this potential application fully. ## Safety concerns Experts warn against uncontrolled consumption, as hallucinations may cause severe psychological effects. Some individuals could experience lasting perceptual disorders. The legal status of these mushrooms varies globally. ## Scientific impact This discovery marks significant progress in neuroscience and ethnopharmacology. Published in the Journal of Psychopharmacology, the findings have generated substantial interest. The research team continues working to formally classify this mushroom species. ## Sources covering this story - https://phys.org/news/2026-08-qa-mushroom-tiny-people-hallucinations.html — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._