Explore how Luis von Ahn's reCAPTCHA and Duolingo harness collective intelligence to digitize books and translate the web, making education accessible to all.
Damon Horowitz discusses the ethical implications of technology and the need for a moral operating system to guide our decisions in the face of increasing technological power.
The Water Canary is a fast, cheap device that answers an important question: is this water contaminated? It doesn't require any special training, and instead of waiting for chemical reactions to take place, it uses light.