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Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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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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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

The sexual cycle of the basidiomycete fungus Coprinus disseminatus. The sexual cycle of the basidiomycete fungus Coprinus disseminatus.
Paland and Lynch demonstrated the importance of sexual reproduction in reducing the frequency of mal Paland and Lynch demonstrated the importance of sexual reproduction in reducing the frequency of mal
Bonobos are close relatives of chimpanzees and of humans. Bonobos are close relatives of chimpanzees and of humans.
Sexual Activity of Heterosexual Couples Sexual Activity of Heterosexual Couples
Sexual Transmission of HIV/AIDS Sexual Transmission of HIV/AIDS
Forms of Sexual Misconduct Cont Forms of Sexual Misconduct Cont
Video: Kidney Stones

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