Yamal and Messi arenât the only stars of the World Cup finals. If youâve been watching any of the games, youâve probably stared directly at a huge, unsung hero: the turf. Turf grass science is a real thing, and itâs John Sorochanâs area of expertise. Heâs a scientist at the University of Tennessee at Knoxville, and heâs spent the last eight years preparing for the grass pitch the players are scoring on. John had the daunting task of figuring out how to create consistency and uniformity across all the World Cup stadiums. That meant dozens o...

