Imagine if your sweat could make the movie you are watching more scary or even change what happens next. That's the idea behind an app developed by Sensum in Belfast, UK. A sensor measures how much you sweat while watching a video and sends the data to your smartphone, which then uploads it to the Sensum website. When paired with specially designed films, it can change what you are watching in real time, making the music more intense or even giving you a different ending.
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