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There are more sensory neurons in the tongue than in any other part of the body.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.