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Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

The sites of early embryonic development in mammals. The sites of early embryonic development in mammals.
Early Spectroscope Early Spectroscope
The effect of a few days of early monocular deprivation on the structure of axons projecting from ... The effect of a few days of early monocular deprivation on the structure of axons projecting from ...
The cascade of events by which the stroke-induced release of glutamate kills neurons. The cascade of events by which the stroke-induced release of glutamate kills neurons.
Early geologists discovered evidence of past glaciations in U-shaped valleys Early geologists discovered evidence of past glaciations in U-shaped valleys
Earth’s Early Atmosphere Earth’s Early Atmosphere
Video: Transcription—A molecular view

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