NPR
A mighty cheer erupts from El Sadar — Pamplona's massive soccer stadium. Ossasuna, the local team, is winning.
Iker Zuriguel estimates there are some 20,000 to 25,000 people inside the stadium clapping, stomping, and yelling. He's hovering just outside the match — but he's not here for the game.
"We came here because there is a crowd," says Zuriguel, an applied physicist at the nearby University of Navarra. He studies the movement of such crowds to optimize their flow and comfort — and improve public safety.
"A lot of people trying to move too fast in a huge crowd can be dangerous," he says — whether it's happening at a concert, pilgrimage, or sporting event like this one. It can lead to injury, trampling, and, in the worst scenarios, fatalities .
Within seconds of the game endin
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