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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Thyroid conditions may make getting pregnant impossible.
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.
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.