The camera you own has one main lens and produces a flat, two-dimensional photograph, whether you hold it in your hand or view it on your computer screen. On the other hand, a camera with two lenses (or two cameras placed apart from each other) can take more interesting 3-D photos.

A team of chemists and physicists at the University of California, San Diego has developed a tiny, inexpensive sensor capable of detecting hydrogen peroxide, a chemical used in the most common form of homemade explosives, in the parts-per-billion range.

Nanotech advance heralds new era in heating, cooling and power generation

Ed Hayward, MIT
March 20, 2008

Researchers at Boston College and MIT have used nanotechnology to achieve a major increase in thermoelectric efficiency, a milestone that paves the way for a new generation of products - from semiconductors and air conditioners to car exhaust systems and solar power technology - that run cleaner.