The longest a person has survived after a heart transplant is 24 years.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
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The horizontal fraction bar was introduced by the Arabs.
Some organisms used as models in genetic research
Close-up of a cat's claw, with the quick clearly visible
Close-up of Pluto
Kyo and jitsu-concept of energy deficiency and excess from shiatsu.
A phylogenetic tree showing that all non-African human populations share a closer genetic relationsh