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 The Creature from the Pit The Creature from the Pit is the third serial of the 17th season of the British science fiction television series "Doctor Who", which was first broadcast in four weekly parts on BBC1 from 27 October to 17 November 1979. It is the first serial made to feature David Brierley as the voice of K9. The serial is set on the planet Chloris. In the serial, Lady Adrasta (Myra Frances) imprisons the Tythonian ambassador Erato in a pit for fifteen years in order to maintain her control over the planet's limited metal supply. The alien time