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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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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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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Differently shaped objects were placed in the nests of robins and catbirds. Differently shaped objects were placed in the nests of robins and catbirds.
All objects in the image are distant galaxies – not stars All objects in the image are distant galaxies – not stars
The Volumes of Objects with Different Densities The Volumes of Objects with Different Densities
Looking at objects in nature is a great way to encourage joint attention and allows infants to learn ... Looking at objects in nature is a great way to encourage joint attention and allows infants to learn ...
Steel-toed shoes are a worthwhile investment to help prevent foot injury due to falling objects. ... Steel-toed shoes are a worthwhile investment to help prevent foot injury due to falling objects. ...
(A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ... (A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ...
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