The video “Dogs and More Dogs” presents one of the most puzzling questions in evolutionary biology: how did the diversity of dogs evolve from a relatively homogeneous wolf population. Anthropological data suggests that dogs appeared about fifteen thousand years ago. When it comes to the history of the Earth and the majority of organisms that inhibit it, dogs are still very young. It is therefore very remarkable that a species (wolves), which must have looked somewhat similar, could have given rise to the enormous differences that we see between the Chihuahua and the Golden Retriever. The narrator of the video proposed two hypotheses to explain this evolutionary diversification. . The adoption hypothesis suggests that thousands of years ago, our human ancestors met an irresistible wolf cub, fell in love with it, and brought it home to raise as a pet. Through constant battles against the predatory instincts of wolves, our ancestors were able to artificially select the most tame animal and eventually domesticate wolves, which became dogs. On the other hand, the "remaining hypothesis" proposes that the domestication of wolves took place. as a by-product of city development. When man settled in villages, landfills would inevitably have appeared. This provided a new ecological niche for wolves: scavengers of human waste. Tame wolves that were not afraid of humans would have an advantage in obtaining food from the dump. Animals that could benefit from this resource would not need to hunt in the wild and would therefore have a better chance of survival. Over generations, natural selections would favor taming and facilitate its spread within the scavenging wolf population. This then gave birth to the dogs. Whether dogs appeared...... middle of article...... Their results suggest that a few dominant effect SNPs (2 to 6 typically) can explain large amounts of morphological differences in dog breeds. dogs (70%). This suggests that the evolution of dogs from wolves may have been the result of a few very significant point mutations that swept through the population because they produced traits desirable to humans. In summary, although the video provides two possible and seemingly logical models for evolution in dogs, it does not consider the genetic basis of selection and other possible mechanisms of evolution. Further genomic studies are needed to better elucidate the evolution of dogs. Works Cited Boyko, AR, Quignon, P., Li, L., Schoenebeck, JJ, Degenhardt, JD, Lohmueller, KE, ... & Ostrander, EA (2010). A simple genetic architecture underlies morphological variation in dogs. PLoS Biology, 8(8), e1000451.