The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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 longest a person has survived after a heart transplant is 24 years.
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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.
The vertebrate vestibular system.
Changes in boreal forest composition along a chronosequence in Quebec. Dates refer to the year of th
Arterial System Anatomy
Digestive System
The Transduction of Sound Vibrations in the Auditory System