Artificial intelligence (AI) could lead to the extinction of humanity, warn some experts, including the heads of OpenAI and Google Deepmind. But how can machines prevail over humans? Since its launch in November 2022, ChatGPT - a chatbot that uses artificial intelligence (AI) to answer questions or generate text or even code on demand from users - has become the fastest-growing internet application in history. The bosses of IT giants were called to the White House: they talked about the risks...