SciShow
What Color is Your Blood?
Everyone knows that blood is thicker than water, but do they know what color it is when it is circulating? The various proteins that determine the color of this vital mixture are revealed, and the question is answered once and for all!...
Bill Nye
Bill Nye The Science Guy on Blood and Circulation
Did you know that high-speed aviators need to wear a special g-suit in order to keep blood flowing to their brains when experiencing intense acceleration forces? Bill Nye takes a flight in such a situation. After his trip, two facts...