World of Biology on Instagram: "When fertilization occurs, the egg releases a tiny “zinc spark” a microscopic flash captured through advanced imaging. This light burst marks the activation of the egg and the very first step toward forming new life. It’s one of biology’s most beautiful and symbolic moments, showing how life begins with both science and wonder. #biologyfacts #sciencereels #viralreels Have you ever heard of the ‘zinc spark’ during fertilization?”"