A robot that watches for someone's heart stopping. When it happens, it drives itself across the room to the person and starts doing CPR while the ambulance is on the way.

Every year, more than 350,000 people in the US experience cardiac arrest outside of a hospital setting. The difference between life and death often comes down to those critical minutes before emergency services arrive-minutes where CPR must be performed continuously, consistently, and correctly. But bystanders freeze, panic, or simply don't know how to administer CPR properly. First responders face impossible response times. And even trained individuals grow fatigued, their compressions becoming shallow and ineffective after just two minutes. In fact, according to the American Heart Association, the survival rate drops by 7-10% for every minute without CPR. After just 10 minutes, survival is nearly zero.