You know you should eat more vegetables. We all do. If you’re one of the millions of people who are trying to live better, chances are you make a conscious effort to forego sweets and fast food for the occasional salad or green smoothie — because vegetables, no matter which ones, are always healthy, right? […]
The Apple Watch and Microsoft Band use optical sensors to measure heart rate. The Jawbone Up3, which instead tracks your resting heart rate, uses bioimpedance sensors and several electrodes to measure your skin’s resistance to a small amount of electrical current. Originally, all photography was monochrome, or black-and-white. Even after color film was readily available, black-and-white photography continued to dominate for […]