If you’re a part of a native Amazonian sect called the Tsimane, you can probably expect to see a surge in visits from health researchers in the near future. At least it’s for a good reason. It appears that you have the healthiest hearts in the world. And the rest of us want to figure out how that happened (especially since you aren’t particularly thin, you don’t do a ton of intense exercise, and you still cling to your carbs).