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 total lunar eclipse will flush the moon blood red Thursday night into Friday morning across the Western Hemisphere. The best views will be from North America and South America. Parts of Africa ...

Anisopoikilocytosis is when you have red blood cells that are of different sizes and shapes. It has several possible causes. Results from a blood smear can also find mild anisopoikilocytosis.