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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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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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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

A subdural hematoma. A meningeal vein is ruptured and blood has accumulated in the subdural space, p A subdural hematoma. A meningeal vein is ruptured and blood has accumulated in the subdural space, p
On May 15, 1916, after deliberating for one hour, an all-white jury in Waco, Texas, found seventeen- On May 15, 1916, after deliberating for one hour, an all-white jury in Waco, Texas, found seventeen-
Aerial view of old hutong area, Beijing. Aerial view of old hutong area, Beijing.
An exploded view of a gerotor electric fuel pump. An exploded view of a gerotor electric fuel pump.
Superior & inferior view of the tarsus (ankle) Superior & inferior view of the tarsus (ankle)
Lineup of leukocytes (white blood cells) Lineup of leukocytes (white blood cells)
Video: Graded potentials - electrical characteristics and types

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