The human body produces and destroys 15 million blood cells every second.
Did you know?
Cyanide works by making the human body unable to use oxygen.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Bill Viola. Room for St. John of the Cross. 1983.
U.S. Racial-Ethnic Groups
Sperry’s classic study of eye rotation and regeneration.
Blood Groups and Blood Types
Estimates of the dates of origin and extinction of the three main groups of hominins (green, blue, a