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.
In some mammal species, males establish breeding territories, where they put on displays for the females, showing that they are healthy and strong. In others, the males fight for the right to mate. Many male hoofed mammals have horns or antlers, which they crash or lock together in tests of strength.ARSUPIALS. MONOTREMES. FIND OUT MORE. A group of warm-blooded animals with a bony skeleton, mammals include mice and other RODENTS, PRIMATES, such as monkeys and humans, and animals as various as hippos, deer, and cats.