It's rare to see one of these nocturnal bloodsuckers unless you know what you should be looking for. Video

James D. Watson, Frances Crick, and Maurice Wilkins were awarded the Nobel Prize in Physiology or Medicine in 1962 for their discovery of the structure of DNA.

Stroke is the third leading cause of death, as well as the leading cause of serious disability among adults. Strokes are unbiased; they can touch anyone at any time, regardless of age, race, or gender; which means children can also be affected.

A whopping one out of every three stroke survivors leave the hospital without knowing the cause of their stroke.