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The 10 Coolest Suitcases for Holiday Travel

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. The Apple Watch and Microsoft Band use optical sensors to measure heart rate. The Jawbone Up3. You can […]

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The temperature in your bedroom is perfect. Your blackout curtains have been drawn shut. And you’ve just finished a cup of chamomile tea and novel that made you laugh out loud and forget about whatever was bothering you earlier in the day. You’re just about ready to drift off, and suddenly the air conditioner kicks […]