WINNIPEG, Manitoba, June 4 : When billions of fans tune in to the 2026 World Cup, they will be witnessing the culmination of a global grass-growing mission that has scientists, farmers and turf specialists sweating as much as the players. From Mexico to Canada, across 16 stadiums in wildly different climates, the continental tournament is putting turf science to its ultimate test. The goal: creating living surfaces that can withstand kicks, studs, tackles and scorching summer heat. "It's very