Did you ever hear that blood is actually blue inside your body, but turns red instantly on contact with air? Learn more on this Moment of Science.
Turning blue in the face is easier said than done.
Insect blood is green, and gets its color from the plants it eats.
Octopuses use three hearts to keep their bodies well circulated.
Though hooch makes you feel warmer, alcohol causes your body temperature to drop and can put you at risk of hypothermia.
Not so! Your body acts as a heater and warms up cold air as you breathe it in.
Investigators shine a light on crime scenes mysteries with the help of luminol—a luminescent chemical that reacts with blood.
Blood sugar levels can impair brain health and memory formation.
Ever wonder why sore throats hurt so badly? And why do they occur in the first place?