Peter Kelemen, a professor of earth and environmental sciences at Columbia University, describes how to capture and store carbon dioxide by speeding up a reaction found naturally in certain rocks.
An applied magnetic field creates waves in a liquid containing magnetic nanoparticles (not visible here) that separate two types of microbeads based on their size. The same technique can be used to separate blood cells and bacteria.
Mike Lynch, cofounder and chief executive of Autonomy, talks about how to search unstructured data and explains his company’s technology.
Douglas Smith, a professor of neurosurgery at the University of Pennsylvania, explains how his new nerve stretching technique works to grow artificial nerve transplants.
MIT students, Oliver Yeh and Justin Lee, explain, build, and demonstrate their device that takes pictures of the Earth for less than $150.
A sensing surface developed by Microsoft researchers offers new ways to use computers.
The Remotely Operated and Autonomous Mapping System (ROAMS) creates maps using a rotating laser and camera.