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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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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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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. ( Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
Types of cellular receptors: (a) Drug binds to the receptor opening channel. (b) Drug binds to the ... Types of cellular receptors: (a) Drug binds to the receptor opening channel. (b) Drug binds to the ...
The level in the coolant recovery system raises and lowers with engine temperature. The level in the coolant recovery system raises and lowers with engine temperature.
Sea-Level Rise Sea-Level Rise
Marketing Management (13th Edition) Marketing Management (13th Edition)
Average real hourly wages (2010 dollars) by education level, full-time workers aged 17 to 34 in 2011 Average real hourly wages (2010 dollars) by education level, full-time workers aged 17 to 34 in 2011
Video: Virtual Tour of the Eye Animation

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