Evolution of cetaceans decreasing. Other historical climate events can be correlated and matched with the genome history of the Yangtze River dolphin as well. This shows how global and local climate change can drastically affect a genome, leading to changes in fitness, survival, and evolution of a species. The European population of common dolphins ("Delphinus delphis") in the Mediterranean have differentiated into two types: eastern and western. According to a 2012 study, this seems to be due to a recent bottleneck as well, which drastically decreased the size of the eastern Mediterranean population. Also, the lack of population structure between the western and
The Snow Creature begins to change Parrish’s opinion regarding the creature’s existence (such as the tell-tale “giant footprints”). Finally, the team makes contact with the snow creature, who hurls stones at them from atop his mountain refuge. The expedition tracks the creature to his cave, where they encounter the creature, along with two other Yeti’s - a female and young one. The team also discover Subra’s wife, who is guarded jealously by the snow creature. Parrish forcibly prevents the enraged Subra from shooting the Yeti, reasoning that the creature is more valuable for science alive. This delays the capture long enough to enable