From Google Brain to Claude, Gemini, OpenAI, and AI safety, these researchers and leaders help explain how modern artificial intelligence is being built. When people use artificial intelligence, they usually see product names. They see ChatGPT, Gemini, Claude, Copilot, or Llama. But behind every AI product is a long chain of researchers, engineers, executives, and research labs that helped make the technology possible. The AI age did not appear from nowhere. It was built through decades of work in neural networks, computer vision, language models, large-scale computing, and safety research. Some of the people behind this story are famous. Others are less familiar to ordinary readers, even though their work quietly shaped the systems millions of people now use every day. This article is part of Watching the AI Age’s ongoing series, The People Behind the AI Age, which looks at the human stories behind modern artificial intelligence. This second part of The People Behind the AI Age l...