How automatic transmission almost made sperm whales extinct
Sperm whales are incredibly interesting animals. Amongst their multiple records is their ability to dive deep, fast and long.They are the deepest diving warm blooded animal, they go close to 25 times deeper than their other equally famous and endangered cousin the blue whale. To give an idea of how deep they dive, here is an infographic http://i.imgur.com/ESp2j.jpg The jpg needs to be magnified to get the perspective. From the biological point view what is interesting is not only how they manage to hold their breath for so long but also how they manage to avoid/survive the bends (decompression sickness).