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Did you know?

The horizontal fraction bar was introduced by the Arabs.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

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There are approximately 3 million unintended pregnancies in the United States each year.

A page from Kelileh o Demneh dated 1429, from Herat, a Persian translation of the ancient Indian Pan A page from Kelileh o Demneh dated 1429, from Herat, a Persian translation of the ancient Indian Pan
Cumulative change for six personality-trait domains across the life course show distinct patterns. Cumulative change for six personality-trait domains across the life course show distinct patterns.
The Sun and climate change The Sun and climate change
Married or partnered couples within a visible minority mixed group Married or partnered couples within a visible minority mixed group
Epigenetic changes to DNA, such as methylation, change patterns of gene expression by activating or Epigenetic changes to DNA, such as methylation, change patterns of gene expression by activating or
Suppose the market supply curve is p = 5Q. If price increases from 10 to 15, the change in ... Suppose the market supply curve is p = 5Q. If price increases from 10 to 15, the change in ...
Video: Secondary and tertiary levels of protein structure Animation

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