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Featured products from our latest reviews.
What Your Wrist Sensor Actually Sees: How a PPG Sensor in a Smartwatch Works
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Latest Investigations
Digital Wall Calendar With Weather: Screen, WiFi, and Memo …
The typical household manages its schedule across at least three different systems. A paper calendar pinned to the re...
The Invisible Interface: What Happens Between Your Gym Equi…
The crack appears on a Tuesday. You notice it while wiping down the floor after a workout -- a thin, branching fractu...
The Physics Hidden Inside Your Morning E-Bike Commute
The hill on Maple Street rises at an 8 percent grade. For two years, Laura walked her conventional bicycle up it, pan...
Why Sitting Down Changed Everything About Electric Scooters
Marcus used to arrive at work with numb hands and a sore lower back. His stand-up electric scooter covered the 2.5 mi...
How a Camera That Nobody Operates Knows Exactly Where the B…
The basketball court at Lincoln Middle School has no broadcast booth. There are no camera towers, no cable runs, no p...
The Mathematics Between You and Decompression Sickness
At 30 meters below the surface, the pressure is four atmospheres. Every square centimeter of your body experiences fo...