The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The horizontal fraction bar was introduced by the Arabs.
heart model front
computer model of the AIDS virus
Model for control of cytoplasmic polyadenylation and translation initiation
A space-filling model of DNA.
Model for induction of B. subtilis tyrS gene by uncharged tRNATyr
Principles of Pediatric Nursing: Caring for Children (Ball et al.)