If you need to create a high vacuum, there are basically two options: turbomolecular pumps and diffusion pumps. Turbomolecular pumps require rotors spinning at many thousands of rotations per ...

A woman shops for second hand lighting at a thrift store. - Crispin La Valiente/Getty Images It takes a special eye to see promise in fluted glass lampshades from a dated light fixture. Even if they ...

Red light therapy has long been used to reduce inflammation and improve skin texture, which is why LED masks are having a moment—you can reap the benefits without booking a professional treatment. As ...