Mehdi Moussaïd
scientist specializing in crowd research
- Born
- 23 July 1981, Rabat
- Age
- 45
Mehdi Moussaïd (born 23 July 1981 in Rabat) is a French and Moroccan cognitive scientist, science communicator, YouTuber and writer who specialises in crowd research. He received a doctorate in ethology from Toulouse III - Paul Sabatier University in 2010 and has worked at the Max Planck Institute for Human Development. His YouTube channel, 
Fouloscopie, on crowd behaviour, had about 537,000 subscribers in November 2025.
Mehdi Moussaïd’s social media accounts
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