If you already own one of the best telescopes and you want to safely view the partial solar eclipse on the 29 March, you may want to opt for a filter instead of buying a whole new solar telescope just ...

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 ...

Here's how to safely watch the rare astronomical event on Aug. 21. — -- Wherever you are in the United States on Aug. 21, you may want to look up and watch as the sun goes dark, with the moon ...

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Do-it-yourself air filters are safe, effective and can be used to protect your lungs from California wildfire smoke. Wildfire smoke is harmful and can stretch hundreds of miles. The smoke from the ...

Melitta, the German maker of the original paper coffee filter, retooled its production to make masks. A director called the filter’s perfect fit over the face “a gift from heaven.” Credit...Daniel ...