A rivalry developed between Spain and Portugal over the exploration of the seas. When King Ferdinand and Queen Isabella of Spain heard of King Manuel's plans to send ships west to claim for Brazil, they asked him to wait until it was decided to whom the seas and conquests belonged.
In 1493, Pope Alexander VI established the Treaty of Tordesillas, which divided the world in two. Portugal could claim lands East of the Line of Demarcation, and Spain could claim lands West of the line.
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The Persian Empire entered a period of decline after a failed invasion of Greece by Xerxes I in 480 BC. The costly defense of Persia's lands depleted the empire's funds, leading to heavier taxation among Persia's subjects
Government should intervene in unfair business practices
Answer: When humans migrated from Africa to colder climates, they made clothing out of animal skins and constructed fires to keep themselves warm; often, they burned fires continuously through the winter. Sophisticated weapons, such as spears and bows and arrows, allowed them to kill large mammals efficiently. Along with changing climates, these hunting methods contributed to the extinction of giant land mammals such as mammoths, giant kangaroos, and mastodons. Fewer giant mammals, in turn, limited hunters’ available prey.
In addition to hunting animals and killing them out of self-defense, humans began to use the earth’s resources in new ways when they constructed semi-permanent settlements. Humans started shifting from nomadic lifestyles to fixed homes, using the natural resources there. Semi-permanent settlements would be the building-blocks of established communities and the development of agricultural practices.
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