Summary of Human Evolution

ABOUT 13.5 BILLION YEARS AGO, MATTER, energy, time and space came into being in what is known as the Big Bang. The story of these fundamental features of our universe is called physics. About 300,000 years after their appearance, matter and energy started to coalesce into complex structures, called atoms, which then combined into molecules. The story of atoms, molecules and their interactions is called chemistry. About 3.8 billion years ago, on a planet called Earth, certain molecules combi...

 Social Rules that Provide for Fathers

In all human cultures there is some sort of father in the typical family, either the biological father or a male maternal relative, who acts in ways that all societies would agree are paternal.^ ^ Anthropologists suggest that biological fathers in particidar have an important parenting role in societies where family life is strong, women contribute to subsistence, the family is an integrated unit of parents and offspring working for the same goal, and men are not preoccupied with being warrio...