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 security co-ordinator and during one of his visits to Iraq, Stirrup met the new Basra security coordinator, General Mohan. Mohan wanted the British forces to withdraw from Basra and Stirrup stressed that once British forces had departed, Mohan's Iraqi forces would have to deal with security. Both Mohan and Stirrup were clear that retaining British forces outside Basra would be an insurance policy against a deteriorating situation within Basra as well as give Mohan something additional with which he could threaten the militias. Stirrup was concerned that a redeployment would look as though the British had been "bombed out of