Indian-origin 9th-grade student Sirish Subash won the 3M Young Scientist Challenge 2024 for developing an AI-powered handheld pesticide detector, earning a $25,000 prize. His device, 'Pestiscand', detects pesticide residues on produce with over 85% accuracy. The competition, organized by 3M and Discovery Education, brought together ten finalists who spent months honing their projects.