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The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in
Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of
A mother dies, a father loses his leg—such calamities shattered poor urban families. Orphaned street
Jean Piaget influenced the field of developmental science more than any other individual.
Niche: An individual’s ecological role
Brain metabolism in a schizophrenic individual (left) and a normal individual (right). These scans o