In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
Development of epithelial appendages
Pattern development in a human embryo
Oral Anatomy
The geomagnetic polarity time scale shows how Earth’s magnetic pole has changed through geologic tim