What are the implications for understanding the extinction of earlier members of the genus Homo?

Mountain gorilla genomes reveal the impact of long-term population decline and inbreeding – Xue, et al. 2015Mountain gorilla genome-Science-10April2015.pdf1. What evidence do the authors use to support their conclusion(s)?2. What are the implications for understanding the extinction of earlier members of the genus Homo?3. Is there a way to reverse this trend in Mountain gorillas? Explain.