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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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Blood is approximately twice as thick as water because of the cells and other components found in it.

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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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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Drawer Test Drawer Test
Flynn Effect IQ scores have risen across developed countries in recent decades. Source: Flynn (199 Flynn Effect IQ scores have risen across developed countries in recent decades. Source: Flynn (199
Median Annual Earnings of Full-Time Workers, by Gender, 1960–2010 Median Annual Earnings of Full-Time Workers, by Gender, 1960–2010
Voltmeter hookup to test the voltage drop of the charging circuit. Voltmeter hookup to test the voltage drop of the charging circuit.
The Wisconsin Card Sorting Test. This woman is just starting the test. If she places the first card ... The Wisconsin Card Sorting Test. This woman is just starting the test. If she places the first card ...
Urine Test for Pregnancy Urine Test for Pregnancy
Video: Simple and Double Sugar

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