Why do experts believe humans
began to migrate and expand
outside of the African continent?

because of the evidence in our skin color and eye color. As humans expanded toward the north, out r skin got lighter from less exposure to the sun, and the weather changed the pigment in our eyes.

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)

the installment plan of the 1920s, an arrangement that allowed people to buy what they wanted with a small down payment and pay off the rest in monthly installments, provided americans a way to own what they did not have the money to buy.