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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
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.