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Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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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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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

African night adder African night adder
A Typical Pattern of Sleep Stages During a Single Night A Typical Pattern of Sleep Stages During a Single Night
This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S
Vincent van Gogh, The Starry Night. Vincent van Gogh, The Starry Night.
Roy Orbison - I Drove All Night (Official Video) Roy Orbison - I Drove All Night (Official Video)
Video: Energy Flow - Trophic Levels and Food

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