A high-school senior has built a simple water filter using a common tree seed that can effectively remove bacteria such as E. coli and other pollutants. Distributing the easy-to-follow instructions on ...

Engineers fabricated a simple water filter modeled after the mobula ray’s plankton-filtering features. Pictured are pieces of the filter. Filter feeders are everywhere in the animal world, from tiny ...

Reliable access to clean drinking water is essential when you're miles from the nearest trailhead or paddling along a remote river. While clear streams and alpine lakes might look pristine, they can ...