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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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
Some organisms used as models in genetic research
Apparent and True Orbits of Alpha Centauri.
Research Methods
Piaget's research involved several kinds of conservation tasks