Experts have discovered that in tropical climates like that of Singapore, even a small drop in temperature increases the risk of heart attack among older adults over the age of 65. The experts set out to investigate how temperature changes may influence a specific type of myocardial infarction, which is the medical term for a heart attack. "Myocardial infarction is an important cause of cardiovascular mortality and can be precipitated by climatic factors. The temperature dependence of myocardial infarction risk has been well examined in temperate settings....