Vaccines prevent between 2.5 and 4 million deaths every year.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
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The average adult has about 21 square feet of skin.
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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
A colour print of platypuses from 1863
Palm print
In 2005 historian Angela Lakwete used this print as the cover of Inventing the C
Timothy O'Sullivan (negative) and Alexander Gardner (print), A Harvest of Death, Gettysburg, ...