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Distribution of glaciers in North America (a) in the late twentieth century, and (b) 18,000 years ag
The Taung Child, the first of the australopithecines to be discovered, is the type specimen for Aust
Lycophyte Life Cycle
A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a
Review Cognitive Changes over the Adult Years
A diagram showing one of Mendel’s crosses. True-breeding strains of pea plants with smooth and ...