After a decade of testing PCs, routers, and home networks, I know what causes slow speeds and how to optimize your internet.

Don't settle for sluggish Wi-Fi. Learn what internet speed tests mean and how to troubleshoot and fix common issues. Joe Supan is a senior writer for CNET covering home technology, broadband, and ...

Molecular tests are far superior to rapid antigen tests—and now you can get them for home use. Amanda Blum is a freelancer who writes about smart home technology, gardening, and food preservation.

The blood test that detects nicotine is called a cotinine test. It measures recent tobacco use and exposure. Cotinine is a chemical that comes from the breakdown of nicotine in the body. A blood test ...