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Human skin color
Human skin color can range from almost black to nearly colorless (appearing pinkish white due to the blood in the skin) in different people. In general, people with ancestors from sunny regions have ... > more -
Epistemology
Epistemology or theory of knowledge is the branch of Western philosophy that studies the nature and scope of knowledge. Much of the debate in this field has focused on analyzing the nature of ... > more -
Premenstrual stress syndrome
Premenstrual Stress Syndrome (PMS, also called Premenstrual Stress, Premenstrual Tension, PMT, Premenstrual Syndrome, Periodic Mood Swing) is stress which is a physical symptom prior to the onset of ... > more -
Drug addiction
Drug addiction, or substance dependence is the compulsive use of psychoactive drugs, to the point where the user has no effective choice but to continue use. Drug addiction has two components: ... > more -
Central nervous system
The central nervous system (CNS) represents the largest part of the nervous system, including the brain and the spinal cord. Together with the peripheral nervous system, it has a fundamental role in ... > more
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