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States of Mexico Reference Libraries

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Sky Islands
2009-07-04 14:40:55

Sky Islands are mountains located within ranges that are isolated by valleys in which other ecosystems are located. As a result, mountain ecosystems are isolated from each other, and species can develop separately, as occurs on island groups such as the Galápagos Islands. The best known example of sky islands are the northern end of the Sierra Madre Occidental in New Mexico, Arizona,...

Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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