Water is something most people take for granted because it’s so easy to turn on the faucet and fill a glass with the cool, pure liquid. But, there are times when access to clean drinking water is not ...

If your home uses well water, you might assume it's pure because it comes from deep underground, but that's not always the case. It's different from city water, which is treated and tested regularly ...

Este recurso está disponible en español. This resource is available in Spanish. This activity is part of Science Friday’s Down to Earth program. Have you ever rinsed a bunch of grapes or a head of ...