The Sophisticated Threads behind a Hat That Senses Traffic Lights

The researchers' proof-of-concept beanie is knitted with germanium fibers that can sense changing traffic lights and tell pedestrians with visual impairments when they're clear to walk.

But now, for the first time, researchers have developed a method that creates long, flexible fibers with intact light-detecting and electronic properties as the woven beanie proved.

Read at www.scientificamerican.com