A person's heart beats about 2.5 billion times over the span of an average lifetime. We seem to take that for granted. Half of Americans suffer some form of heart disease, and more than 840,000 people died last year from heat-related illnesses (including strokes), which is more than cancer and COVID-19 combined.

Swapping out tofu for your morning eggs or using beans instead of ground beef in your chili could help you live longer, a new study reports.