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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

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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.

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There are more sensory neurons in the tongue than in any other part of the body.

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The average adult has about 21 square feet of skin.

human leukocyte on mesh fibrin human leukocyte on mesh fibrin
The early stages of the human life cycle. The early stages of the human life cycle.
The human olfactory system. The human olfactory system.
The major human endocrine glands and their central nervous system control centers The major human endocrine glands and their central nervous system control centers
Plot showing the number of genes on each human chromosome Plot showing the number of genes on each human chromosome
Major bone (tan) and cartilage (light blue) elements of the human skeleton. Inset shows regions of v Major bone (tan) and cartilage (light blue) elements of the human skeleton. Inset shows regions of v
Video: Sigmoidoscopy

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