The life-span perspective takes into account development from

Lifespan perspective is a method to the study of human development that takes into account all phases of life, not just childhood and adulthood. The growth and development of lifespan perspective are:

Multi directional which the human characteristics alteration by increasing, decreasing or holding steady. Therefore, change is dynamic.

Multi contextual which arise in many contexts such as physical environments, family, constellations, past, socioeconomic.

Multicultural which culture plays a vital role in shaping development. It is the method of gathering information and ascribing meaning and value to life among a group of people. Culture affects every action and thought.

Multidisciplinary which biological cognitive and social domains, with each one the specialty of scientists in a particular discipline

Plastic which is a human trait can be molded but people remain a certain durability of identity.

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.