According to NASA, the red appearance is a result ... "dark environment away from bright lights makes for the best viewing ...

Polycythemia vera (PV) causes your bone marrow to make too many red blood cells. You need these cells to carry oxygen around your body, but too many of them can make your blood thicken and form clots.

When the moon passes through this part of Earth’s shadow, it is typically referred to as a Blood Moon. This phenomenon is the same as what makes the sky blue and sunsets red, the space agency ...

For the first time in three years there will be a total lunar eclipse, which will give the moon a blood-red glow. Bruce Bookout, professor of astronomy at Pikes Peak State College and a member of ...

the soft center where new blood cells grow. It causes your marrow to make too many red blood cells so your blood is too thick. You may be more likely to have clots, a stroke, or a heart attack.