Sharks are able sense a drop of blood from 2.5miles away
Insects are cold blooded.
George Washington died when his doctors tried to cure his epiglottitis (i.e. inflamed throat) with blood letting.
blood (17ml) can substitute for an egg in baking
Saddam Hussein commissioned a calligrapher to write a copy of the Quran using 27 liters of his blood as ink.
Lobsters have curious blood. It is normally transparent, but then turns blue when exposed to oxygen.
Butterflies will feast on your blood and tears if given the chance.
Red blood cells live an average of 4 months and travels between the lungs and other tissue 75,000 times before returning to bone marrow to die
Moths have white blood
An individual blood cell takes about 60 seconds to make a complete circuit of the body
There is 0.2mg of gold in the human blood stream, making a human's blood worth around 10 cents.
Lobster blood is blue due to its containing copper
Spiders mostly have transparent blood
Veins are not in fact blue. They only look blue because subcutaneous fat only allows blue light to penetrate skin
It would take a swarm of about 1.1 million mosquitos sucking at the same time to drain all the blood from an adult human.
Blood appears green underwater at about nine meters or so because there is no red light under water, therefore, there is no red light that can bounce off of your blood into our eyes.
Horned lizards can shoot blood from their eyes.
Octopuses have three hearts, nine brains, and blue blood
Starfish don’t have blood. They circulate nutrients by using seawater in their vascular system.
A seashell held up to the ear doesn't let you hear the ocean, but rather the blood running through your veins