Evolution of the cochlea of the ear, consisting of the scala media, the scala tympani, and the scala vestibuli. Regarding mammals, placental and marsupial cochleae have similar cochlear responses to auditory stimulation as well as DC resting potentials. This leads to the investigation of the relationship between these therian mammals and researching their ancestral species to trace the origin of the cochlea. This spiral-shaped cochlea that is in both marsupial and placental mammals is traced back to approximately 120 million years ago. The development of the most basic basilar papilla (the auditory organ that later evolved into the Organ of Corti in mammals) happened
Jock Stirrup was one of 200 public figures who were signatories to a letter to "The Guardian" opposing Scottish independence in the run-up to September's referendum on that issue. In June 2015 Stirrup joined the House of Lords' EU External Affairs Sub-Committee. From October 2015 Stirrup has been the president of the Pilgrims Society. On Remembrance Sunday 2014, it was announced that Stirrup would lead the efforts to raise one million pounds to enable a national memorial to the British service personnel who fought in Iraq and Afghanistan to be erected in central London. By March 2015 Stirrup was confident that the