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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
There are 60,000 miles of blood vessels in every adult human.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.