With the launch of the Logitech MX Master 4, I decided to retire my five-year-old, worn-out MX Master 3. Here are five things I learned about the new mouse in the process.

Full study: “ A smart cup for wireless, biofuel-powered, sweat-based vitamin C sensing .” Co-authors of the study include Muhammad Inam Khan*, Ryan Burns*, Akshit Agarwal, Lu Yin, Jongmin Moon, Bumsik ...