Finally, I found a robot vacuum that leaves my two-year-old model in the dust

For about two years, the S1 was my favorite robot vacuum and mop combination. But as good as it was, it had issues -- some ...

Diffractive networks enable optical information transfer through random and unknown diffusers

The transmission of optical information through random scattering media is a major challenge in optics, biomedical imaging, ...

Air conditioning 101: An area expert on how it works and how to make your AC more efficient

Air conditioning can feel like magic on a hot day. An HVAC instructor at Northern Virginia Community College explains how it works.

Doctors bust the biggest myth about lymphatic drainage: Popular methods and tools ranked by evidence

Think lymphatic drainage flushes toxins out? It doesn't. Here's what really happens, plus rankings of popular at-home tools.