The signs of a dangerous blood clot can vary depending on its location. Some people may also not experience any symptoms.

Anemia is when you have low levels of red blood cells. When this happens, your organs and tissues have a harder time getting oxygen. You may feel fatigue, weakness, and shortness of breath.

A viral video shows 'blood rain' flowing down an Iranian mountain. This rare phenomenon looks like red rain and is caused by soil rich in iron oxide m ...