Development is a crucial part to the success of humans and many other creatures. But what is development? It is progression from one stage to another in any way shape or form. Many psychologists try to uncover the secrets of development; whether it be physical, social, emotional, or cognitive, the development process in humans is grandiose in both its scale and complexity. Chapter ten focuses on the development of human beings from conception to death. What I found to be most interesting about the chapter is the section titled "Infant Motor Development: How Babies Get going". I found it shocking that babies are born with several automatic motor behaviors. An example of an automatic reflex is the rooting reflex, where a baby has the natural instinct to find a nipple and begin sucking. Another strange phenomenon with infant motor development is the fact that all children acquire motor milestones in the same order. The answer to this occurrence is not yet proven, however, and remains as one of the many mysteries of human development. Overall, whether it be physical, social, emotional, or cognitive, the development process in humans encompasses a vast expanse of information and undiscovered secrets.