Samsung's mobile health app can now tell when you're stressed out

The Galaxy S5's heart rate sensor has mostly been handy for fitness gurus, but it's now helpful for the rest of us, too. Samsung has pushed out an update to S Health that uses the sensor to track stress levels; if your heart is racing after a bad day at work, you'll know. The app also tracks long-term trends, so it should be clear when you're overdue for a vacation. While S Health won't help you get rid of the annoying coworkers or personal dramas that cause stress, the app will at least make it clear that it's time to relax.

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Scientists make deep-brain implants possible through wireless charging

Stanford researchers have figured out a way to wirelessly charge electronic devices that are deep inside your body. Currently pacemakers and nerve transmitters need to have large receiving coils near the top of your skin to charge up (limiting where you can put them), or periodically have their battery replaced through surgery. This new method, however, would allow devices to be much smaller because they don't have to tote around such a huge battery. Also since they're not reliant on charging coils they could live much deeper in the body and brain.

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Tiny medical bot

Tiny medical bot:

This tiny bot wants to go inside your body. That’s right, it was designed to travel through veins. The little bot has no on board propulsion system. It is controlled by a magnet outside the body. See those little spines? Those straighten out to keep the bot in place when it isn’t supposed to move. Creepy right? In all the articles we’ve seen on this bot, there aren’t any details about what actually is on board. They mention adding a camera in the near future, but why are they calling it a robot? Surely there’s something cool in that little body. This is a quite practical application of a project we covered recently. Commenters weren’t impressed with the external control system, likening it to the old vibrating football player game. Well, here’s where it could be usefull.