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 ...

Concerns about aging pipes, a group of chemicals known as PFAS and taste have fueled a booming market for home water filters.

Unlike countertop units that divert water from a tap to a sink-side cartridge, faucet-mounted water filters are compact devices that attach directly to your faucet. Depending on their efficacy, they ...