Scientists have used gene editing to create sweeter tomatoes without compromising their size or yield. By knocking out two specific genes using the CRISPR-Cas9 tool, glucose and fructose levels in the tomatoes increased by up to 30%. This addresses a longstanding issue in tomato breeding where efforts to boost sweetness often resulted in smaller fruit or reduced yields. The researchers identified two genes that inhibit sugar production and accumulation in tomatoes and used CRISPR-Cas9 to knock them out, resulting in fruit with up to 30% higher sugar content without reducing size or yield. The findings could potentially be applied to other crops.