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#crowds — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #crowds, aggregated by home.social.

  1. Follow the Data! If you do, AVOID prediction markets like the plague.

    Researchers examined EVERY trade on PolyMarket from 2023 to 2025 >> 1.72M accounts and $13.76B in trading volume and discovered that ~ 3% of traders account for most price discovery aka these traders consistently predict outcomes and move prices in the right direction. The rest - the remaining 97% of traders mostly do not, and are on the losing side of trades.

    This analysis indicates that prediction markets DO NOT work because of "collective wisdom" of crowds, they work because of who is informed > also known a Insiders! coindesk.com/markets/2026/04/2
    #PredictionMarkets #PolyMaket #Kalshi #Betting #Gambling #InsiderTrading #MarketForces #Luck #Crowds #Wisdom

  2. Long Bay closed to cars as people on North Shore flock to the beach amid soaring temperatures

    “Be patient where vehicle access to beach and parks will be busy,” said a council spokesperson. “Long Bay…
    #NewsBeep #News #Environment #amid #as #aucklands #bay #Beach #Cars #closed #crowds #during #environment #find #flock #flocked #Long #North #on #People #Popular #relief #Science #Shore #Soaring #temperatures #the #to #todays #UK #UnitedKingdom #Vehicles #weather
    newsbeep.com/uk/364153/

  3. Crowd Vortices

    The Feast of San Fermín in Pamplona, Spain draws crowds of thousands. Scientists recently published an analysis of the crowd motion in these dense gatherings. The team filmed the crowds at the festival from balconies overlooking the plaza in 2019, 2022, 2023, and 2024. Analyzing the footage, they discovered that at crowd densities above 4 people per square meter, the crowd begins to move in almost imperceptible eddies. In the animation below, lines trace out the path followed by single individuals in the crowd, showing the underlying “vortex.” At the plaza’s highest density — 9 people per square meter — one rotation of the vortex took about 18 seconds.

    The team found similar patterns in footage of the crowd at the 2010 Love Parade disaster, in which 21 people died. These patterns aren’t themselves an indicator of an unsafe crowd — none of the studied Pamplona crowds had a problem — but understanding the underlying dynamics should help planners recognize and prevent dangerous crowd behaviors before the start of a stampede. (Image credit: still – San Fermín, animation – Bartolo Lab; research credit: F. Gu et al.; via Nature)

    #activeMatter #collectiveMotion #crowds #fluidDynamics #physics #science #vortices