RoseTracker| Miguel Bruns Alonso has developed a pen that not only measures a person’s stres levels but helps reduce them. Just as some cars can detect aggressive driving and refuse to cooperate with the driver, Alonso’s new pen can give a person feedback on stress levels.
In the experiments, the heart rate of people using the new anti-stress pen fell by an average of five percent. The idea for the anti-stress pen came after Alonso observed that stressed-out people play with their pens. via Science Daily