If you've ever been frying up some juicy burgers and become worried at the sight of red liquid, don't worry, it's not blood.

Cooked steak on wooden board with red juices running out of the meat - longwan/Shutterstock For some red meat lovers, eating a steak rare or "bloody" offers the best taste with an extra juicy texture.

Professor Jonathan Wittenberg used this model of sperm whale myoglobin structure as a teaching tool at the Albert Einstein College of Medicine at Yeshiva University in the Bronx. It was used beginning ...