It's laden with tiny chips, intricate circuitry, and many sensors. Phones have featured sensors for a while (GPS is a sensor), and there have been additions over the years. The inexhaustive list ...

A wide pulse pressure is when the difference between the top number (systolic) and bottom number (diastolic) of your blood pressure reading is more than 100 millimeters of mercury (mm Hg) apart. It is ...