Legend has it that on the vast grasslands of ancient Greece, there galloped a tribe of centaurs with human heads and torsos and horse-like bodies. Due to their inability to control the beastly nature of their bodies, they slaughtered civilians and were ultimately exterminated by the gods. But if in real life, would you be able to accept a creature that is half-human, half-beast? Recently, the British House of Commons passed a motion to cultivate "human-animal hybrid embryos." Following the announcement, debates over human-animal embryos have become even more intense.