Mammals

Mammals are a group of vertebrate animals that are characterized by the presence of mammary glands in both males and females, hairs or fur, and presence of three middle ear bones. All mammals give birth to live young, except for monotremes, which lay eggs. Examples of mammals are humans, cats, camels, horses, dogs, rabbits, and cows. Mammals are incredibly diverse, live in nearly every climate on Earth, and play a major role in many ecosystems. Their uses range from companionship and working animals to providing food for humans. Mammals are also important to humans for their ability to contribute to scientific research, such as medical and biological advances.