BROADCASTS.com

Biosensor technology is used to detect a wide variety of substances — from drugs, to cancer biomarkers, to chemical contaminants in our food and drinking water. Diatoms — tiny, single-celled plants found in water all over the planet — are playing a big role in a new type of biosensor being developed by Alan Wang at Oregon State. The new technology has a high selectivity and sensitivity, and is much less expensive than traditional methods of detection.