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Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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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.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The longest a person has survived after a heart transplant is 24 years.