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 Creature from the Pit Karela, the Huntsman, his Wolfweeds, and some guards, enter the Pit and make their way to the Doctor, Organon and the Creature. The scavengers have meanwhile raided the throne room for booty, including the alien shield. It exerts influence over two of them, who take it to the Pit and place it on the Creature. It turns out the shield is a communication device. Erato, as the Creature is named, is the Tythonian ambassador to Chloris and came to negotiate a treaty exchanging metal for chlorophyll fifteen years earlier. Its craft was the vast egg found in the jungle. However,