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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Everyone has one nostril that is larger than the other.
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People about to have surgery must tell their health care providers about all supplements they take.
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The horizontal fraction bar was introduced by the Arabs.
Fruiting body adaptations that foster spore dispersal.
The four ways in which animals exchange heat with the environment are radiation, evaporation, convec
Forest fragments left by clear-cutting forest from the surrounding landscape have very different phy