Best Ever Q&A Space Our World Nature History Science & Technology Human Body Senses & Organs Science of Life Chemicals & Matter Atoms & Molecules Materials Forces & Energy Sound Electricity & Magnetism Heat & Light Everyday Science Industry Transportation Computers Machines Ships Undersea Exploration Land Travel Cars Flight Structures Buildings Farming	Science of Life How do birds fly? Do animals live in families? How do racing pigeons find their way home? How do plants make seeds? Why do animals of the same species fight? What is a cell?   Previous: Back to Science of Life Book: Best Ever Q&A Section: Science & Technology Chapter: Science of Life