(for more about Power Words, click here)
endangered An adjective used to describe species at risk of going extinct.
lemur A primate species that tends to have a cat-shaped body and usually a long tail. They evolved in Africa long ago, then migrated to what is now Madagascar, before this island became separated from the east coast of Africa. Today, most wild lemurs (some 33 species of them) live only on the island of Madagascar. (One species was introduced to the neighboring Comoro Islands, which was not part of its natural range, and still lives there.)
pitch (in acoustics) The word musicians use for sound frequency. It describes how high or low a sound is, which will be determined by the vibrations that created that sound.
primate The order of mammals that includes humans, apes, monkeys and related animals (such as tarsiers, the Daubentonia and other lemurs).
rainforest Dense forest rich in biodiversity found in tropical areas with consistent heavy rainfall.
species A group of organisms that share similar traits and ancestry, and can usually breed to produce fertile offspring. It is also the basic rank in a classification system called taxonomy. A species name (such as sapiens) is usually given with the next highest rank, the genus (such as Homo).