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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.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
There are approximately 3 million unintended pregnancies in the United States each year.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.