Some fun milestones: 1  The diameter of the Milky Way is 100,000 light years; the observable Universe had this as its radius when it was approximately 3 years old.  When the Universe was one year old, it was much hotter and denser than it is now. The mean temperature of the Universe was more than 2 million Kelvin.
(high blood pressure) as a cause of chest pain in both men and women is listed first because it is the single most common cause of chest pain, including coronary artery disease itself. In other words, more people suffer from chest pain due to high blood pressure than those who have chest pain because of obstructive coronary artery disease.
Many people aren't sure what's wrong when they are having symptoms of a heart attack. Some of the most common warning symptoms of a heart attack for both men and women are: 1  Chest pain or discomfort.2  Most heart attacks involve discomfort in the center or left side of the chest.3  The discomfort usually lasts more than a few minutes or goes away and comes back.ome of the most common warning symptoms of a heart attack for both men and women are: 1  Chest pain or discomfort. 2  Most heart attacks involve discomfort in the center or left side of the chest.