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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.