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Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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On average, the stomach produces 2 L of hydrochloric acid per day.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

A human cuddles a Doberman puppy. A human cuddles a Doberman puppy.
Anterior and posterior views of the adult human skeleton Anterior and posterior views of the adult human skeleton
The skull of Sahelanthropus tchadensis is argued to be the earliest of the hominins and one of only The skull of Sahelanthropus tchadensis is argued to be the earliest of the hominins and one of only
Evolution of Vertebrate Species Evolution of Vertebrate Species
Organs of the human male reproductive system, their functions, and locations. Organs of the human male reproductive system, their functions, and locations.
The distribution of Neandertal and Denisovan DNA in the modern human genome The distribution of Neandertal and Denisovan DNA in the modern human genome
Video: Glycolysis - and oxygen

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