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Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

The hemispheres of the human brain. The hemispheres of the human brain.
Energy pathways Energy pathways
Control of Circadian Rhythms in Sleep and Waking by the SCN During the day cycle, the DMH inhibits t Control of Circadian Rhythms in Sleep and Waking by the SCN During the day cycle, the DMH inhibits t
Dopamine cannot cross the blood–brain barrier. Levodopa, its precursor, can. Once levodopa crosses ... Dopamine cannot cross the blood–brain barrier. Levodopa, its precursor, can. Once levodopa crosses ...
Some of the visual areas that have been identified in the human brain. Some of the visual areas that have been identified in the human brain.
Scanning the Brain Scanning the Brain
Video: Hydrogen bonds - role in the body

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