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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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The horizontal fraction bar was introduced by the Arabs.

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Positron emission tomography (PET) image showing the difference in the metabolic activity of the bra Positron emission tomography (PET) image showing the difference in the metabolic activity of the bra
PET scan of the brain in a patient with Alzheimer’s disease. PET scan of the brain in a patient with Alzheimer’s disease.
Peptic Ulcer Disease Peptic Ulcer Disease
Risks of infectious disease increase in (a) high-density agricultural populations compared to (b) lo Risks of infectious disease increase in (a) high-density agricultural populations compared to (b) lo
Autoimmune disease in primates Autoimmune disease in primates
Location of brain lesions in Alzheimer disease. Plaques are concentrated most heavily in the amygdal Location of brain lesions in Alzheimer disease. Plaques are concentrated most heavily in the amygdal
Video: Definition of heart rate

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