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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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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

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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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Here are images of live zebrafish that were studied for genetics and head size to give insight into Here are images of live zebrafish that were studied for genetics and head size to give insight into
Assumptions of race-ethnicity can have unusual consequences. In this photo, Ethiopian Jews in ... Assumptions of race-ethnicity can have unusual consequences. In this photo, Ethiopian Jews in ...
This advertisement from about 1885 represents an early stage of capitalism when individuals were ... This advertisement from about 1885 represents an early stage of capitalism when individuals were ...
How did you give birth? C section vs. Normal Delivery How did you give birth? C section vs. Normal Delivery
The consequences of crossover in the inversion loop in pericentric inversion heterozygotes The consequences of crossover in the inversion loop in pericentric inversion heterozygotes
Video: Cell mediated immune response to a viral infection Animation

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