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Scientists Found The Last Mammoths On Wrangel Island, 4kyrs Ago, Suffered A “Genomic Meltdown” From Low Diversity. This Caused Harmful Mutations, Damaging Their Smell, Behavior & Fur. Compared To 45k-Yr-Old Healthy Ancestors, Their DNA Had Key Gene Loss. The Study Warns Endangered Species Like Asiatic Cheetahs & Gorillas Face Similar Risks.

DNA clues to why woolly mammoth died out – BBC News

http://www.bbc.com/news/science-environment-39142941

The last woolly mammoths were wracked with genetic disease and had a strange shiny coat, say scientists.