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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

The percentage of women over 40 in the United States who are childless has almost doubled in the ... The percentage of women over 40 in the United States who are childless has almost doubled in the ...
Metric bolt (cap screw) grade markings and approximate tensile strength. Metric bolt (cap screw) grade markings and approximate tensile strength.
Graph showing how the boiling point of the coolant increases as the percentage of antifreeze in ... Graph showing how the boiling point of the coolant increases as the percentage of antifreeze in ...
How to combine approximate and exact numbers when considering significant digits How to combine approximate and exact numbers when considering significant digits
Percentage of youth age 15 to 19 years with at-risk levels of body composition & fitness Percentage of youth age 15 to 19 years with at-risk levels of body composition & fitness
Causes of Trauma Deaths by Approximate Percentage Causes of Trauma Deaths by Approximate Percentage
Video: Transferring genes into plants Animation

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