Twenty-one philosophers investigate the implications of the Jurassic Park franchise for our lives, our values, and our future. Human beings live and thrive by modifying nature, but when do the risks of changing nature outweigh the likely benefits? If it’s true that “Life will find a way,” should we view any modified or newly reconstituted life as a hazard? The new scientific information we could gain by bringing back Tyrannosaurus rex or other dinosaurs is immense, but should we choose to let sleeping dinosaurs lie? And if we do bring them back by reconstituting them from ancient DNA, are they really what they were, or is something missing? How do the different forces — human curiosity, profitability, and philanthropy — interact to determine what actually happens in such cases? What moral