sentences:  Evidence published in 2017 suggests that the early inhabitants of Zhokhov Island were among the first humans to selectively breed dogs.Findings indicate that larger dogs may have been bred for hunting and smaller dogs weighing to were bred for pulling sleds.In modern times, Zhokhov Island was discovered by the 1910–1915 Russian Arctic Ocean Hydrographic Expedition under Boris Vilkitsky on the ships "Vaygach" and "Taymyr".