Forty-five states and territories in the united states are at risk of earthquakes. learn how to prepare for an earthquake with the following safety tips.
Color blindness, also known as color vision deficiency, is the decreased ability to see color or differences in color. color blindness can make some
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Red hair occurs naturally in 1–2% of the human population. it occurs more frequently (2–6%) in people of northern or western european ancestry, and
This section of the specification describes the basic data types that may appear as an element's content or an attribute's value. for introductory