 So low stress resilience isn't something that you're born with. Experiments in animals suggest that exposures to stress very early in life influence your ability to cope with stress. And only if we have a lot of stress early on are we less able to cope with it later on. So for most people with low stress resilience, even minor events can be extremely stressful, cause a lot of anxiety, and put a lot of stress and strain on the heart. So we know from other studies that very stressful events can cause heart attacks. And if you have low stress resilience...