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Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
Did you know?
The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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![Herniated disk. A herniated disk is a protrusion of the disk’s gelatinous center, called the nucleus](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_28_47_10077486.jpeg)