GOOD IDEA, THOUGH I BELIEVE JURASSIC PARK HAD THE SAME SAFETY DEVICE: Scientists Develop Technique Aimed at Preventing Spread of Bio-Engineered Organisms. “The scientists have given a common type of bacterium a unique genetic code that makes it dependent for survival on unnatural amino acids that must be fed to it. If such organisms escaped into the wild, where those amino acids are not available, they would die.”