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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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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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There are more nerve cells in one human brain than there are stars in the Milky Way.

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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Evolutionary adaptation to a new environment via natural selection. Evolutionary adaptation to a new environment via natural selection.
China's proposed supercollider plans to be twice the size of the Large Hadron Co China's proposed supercollider plans to be twice the size of the Large Hadron Co
International Performance in Reading, Math, and Science, Eight Grade International Performance in Reading, Math, and Science, Eight Grade
Caregivers’ responses sometimes help a child with strong emotions adapt to the environment. Caregivers’ responses sometimes help a child with strong emotions adapt to the environment.
Providing structure and organization in the child’s environment may aid the development of ... Providing structure and organization in the child’s environment may aid the development of ...
Testing Infants’ Knowledge Testing Infants’ Knowledge
Video: Autonomic Nervous System Animation

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