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A herd of barren-ground caribou at the Thelon River. This subspecies is a long-distance migrant
Mother giraffe and calves feeding. It is mostly the females that raise young, and they may gather in
Photograph illustrating the development of an embryo.
Erythroblastosis fetalis. (a) The condition occurs with an RH+ father and RH– mother. (b) First preg
Animals in their mother's wombs
The strange situation. The Strange Situation features a series of episodes in which (a) the mother l