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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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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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There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Elk at the Opal terrace at Mammoth Hot Springs, Yellowstone National Park Elk at the Opal terrace at Mammoth Hot Springs, Yellowstone National Park
Spotted hyenas greeting one another in Kruger National Park Spotted hyenas greeting one another in Kruger National Park
An exotic fox in Mornington Peninsula National Park with Mange. An exotic fox in Mornington Peninsula National Park with Mange.
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Many gasoline service stations have signs posted warning customers to place plastic fuel containers ... Many gasoline service stations have signs posted warning customers to place plastic fuel containers ...
Polyps of a reef-building coral Polyps of a reef-building coral
Video: Inflammation Animation

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