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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Human sex chromosomes Human sex chromosomes
Independent assortment of chromosomes at meiosis explains Mendel’s ratio Independent assortment of chromosomes at meiosis explains Mendel’s ratio
A map of the 12 tomato chromosomes A map of the 12 tomato chromosomes
A colorized image of human chromosomes A colorized image of human chromosomes
(a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype (a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype
Genes on chromosomes Genes on chromosomes
Video: Aneurysm

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