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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

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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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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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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.

Great English Migration, 1630–1650 Great English Migration, 1630–1650
This slave burial service, painted by John Antrobus in 1860, reflects an inversion of power relation This slave burial service, painted by John Antrobus in 1860, reflects an inversion of power relation
J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway. J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway.
Types of Health Insurance Service Coverage Types of Health Insurance Service Coverage
Good ethical judgment comes from both learning and experience. Good ethical judgment comes from both learning and experience.
Video: Red alga life cycle Animation

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