Did you know?
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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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
Species-rich Sonoran Desert landscape.
Endangered species
Three phylogenetic representations of modern human origins.
The Big Five Personality Dimensions
Four kinds of evidence supporting the theory that species evolve.
Access to clean drinking water is just as important as adequate nutrition for human health