A Brief Over-view of the Etymology of Modern Goju-ryu Karate-do Kata. By Joe Swift and Mario McKenna. It is now well documented that Okinawa karate is indebted to the Southern schools of Chinese boxing for much of its technical knowledge and expertise.
Best Answer: They are all warm-blooded, and they all have hair even if you can't see it (including dolphins and whales). Mammals all share mammary glands (milk producing glands). This is the biggest feature, also mammals use 3 bones for hearing and they have hair. Should be noted that endothermy (warm-blooded) is not unique to mammals, birds also share this characteristic.
Hair is one of the characteristics of a mammal that is unique to mammalsâno other animals have true hair and all mammals have hair covering at least part of their body at some time during their life.An individual hair consists of a rod of cells that are reinforced by a protein known as keratin.air is one of the characteristics of a mammal that is unique to mammalsâno other animals have true hair and all mammals have hair covering at least part of their body at some time during their life.