Numerous television shows feature blood pattern analysis -- but how do these fictional portrayals measure up to the real thing? Tune in as Chuck and Josh break down the science behind blood pattern analysis.

High blood pressure -- or hypertension -- is elevated pressure of the blood in the arteries. Hypertension results from two major factors. Check out our HowStuffWorks article to learn more about the causes of and treatment for hypertension.

In part one of a special author interview, Dr. Holly Tucker talks about her new book, "Blood Work: A Tale of Medicine and Murder in the Scientific Revolution." Tune in to learn more about the startling history of blood transfusion.

Jamie Thomas founder of zero presents his new video new blood, which contains the most radical skating in the world

Tony nominated Sam Trammel, Sam Merlotte on TRUE BLOOD, joins Lisa Joyner on Hollywood 411 to sort out some of Sam's strange behavior. He sings the praises of creator Alan Ball and the fantastical world of TRUE BLOOD.

Dracula wasn't the only blood-sucker immortalized on film. Here is some of his "competition."

Creatures, bound by the blood of the wolf, that can kill with curses and move at lightning speed, watching the night sky for the rise of the blood-red crescent moon. They are SKINWALKERS. They feed on our flesh and thirst for the taste of human blood. The red moon signals each pack, divided by...

Not every blood donation saves life

The sixth year for Harry Potter at Hogwarts turns out to be very exciting. Harry finds a Potions book which belonged to the mysterious Half-Blood Prince. Harry discovers the Half-Blood Prince's ancient writings are written along the margins of almost every page, giving Harry advice on how to...

Blue Blood is a genre-tweaking documentary about the training regimen and sparring contests of Oxford University students who step out of the ivory tower and into the boxing ring to settle matters with their Cambridge rivals.