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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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There are more sensory neurons in the tongue than in any other part of the body.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

The four ways in which animals exchange heat with the environment are radiation, evaporation, convec The four ways in which animals exchange heat with the environment are radiation, evaporation, convec
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While most people resist labels of deviance, some embrace them. In what different ways do these ... While most people resist labels of deviance, some embrace them. In what different ways do these ...
The paired-image subtraction technique, which is commonly employed in cognitive neuroscience. Here ... The paired-image subtraction technique, which is commonly employed in cognitive neuroscience. Here ...
Video: Protein Secondary and Tertiary Structures - Animation

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