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Bark The Herald Angels Singwill bring a smile to even the most devoted Scrooge. Decked out in the finest of holiday garb, strutting against backgrounds that evoke locales as varied as Charles Dickens London and the ice floes of Antarctica, an adorable dog strikes a pose. Another Christmas card in the bag. But the scenes weren't always so ornate. Photographer Peter Thorpe's first dog holiday shoot went more like this: dog, pair of antlers, red Rudolph nose, done. That card went out to family and friends and the rest, as they say, is history. From Rudolph in 1990 to Santa in 2015,...

The study of human reproductive ecology represents an important new development in human evolutionary biology. Its focus is on the physiology of human reproduction and evidence of adaptation, and hence the action of natural selection, in that domain. But at the same time the study of human reproductive ecology provides an important perspective on the historical process of human evolution, a lens through which we may view the forces that have shaped us as a species. In the end, all actions of natural selection can be reduced to variation in the reproductive success of individuals.

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