This is a subject that has fascinated me ever since I began to have some understanding of the physiological similarities and differences we share with the diving mammals, particularly the Elephant seals. The latest information on their diving behaviour seems to suggest that they are capable of descents close to the depths achieved by the great diving whales.
The Elephant seal has 1 outstanding difference with us –a much higher proportion of myoglobin versus hemoglobin. We have a large proportion of hemoglobin and a comparatively small proportion of myoglobin. The Elephant seal has Continued…