Why Neural Networks Matter

Neural networks power the technology you use every day. Every time you ask Siri a question, one network converts speech to text, another works out your intent, and a third generates the response — three networks chained together in under a second.

Image generation tools like DALL-E and Midjourney turn text descriptions into pictures, and the same kind of architecture that learned to recognize cats can learn to create them. DeepMind's AlphaFold cracked a 50-year grand challenge in biology, predicting the 3D structures of more than 200 million proteins. The real lesson is versatility: one core idea, reshaped, solves problems from speech to chemistry.