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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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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Thyroid conditions may make getting pregnant impossible.

Sound Waves from Clarinet Sound Waves from Clarinet
Hearing and Reading Words Hearing and Reading Words
Subtle Differences in Written Words Subtle Differences in Written Words
Children can fast map the meanings of words in a single exposure. Children can fast map the meanings of words in a single exposure.
The relation between the physical and perceptual dimensions of sound. The relation between the physical and perceptual dimensions of sound.
Front Panel on Sound Box of the Great Lyre with Bull’s Head Front Panel on Sound Box of the Great Lyre with Bull’s Head
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