The answers are:
Meriwether Lewis, William Clark and Sacagawea
<span>South America. It practically covered the entire western coast of the continent. :)</span>
The framers of the United States Constitution based our federal government on federalism. ... Federalism has evolved over the course of American history. Some important events have shaped the balance between the national and state governments so that federalism best suits the needs of the country at that time.
<span>Advancements in navigation. The Gupta Empire were very advanced in the fields of technology, science and art. The scholar Aryabhatta calculated that a solar </span>year was 365.358, <span>he also calculated </span>pi<span> to the fourth decimal place at a </span>value of 3.1416. <span>Kings in the </span>Gupta empire<span> owned huge copper, gold, and iron mines, and made advancements in metalworking. </span>
According to the doctrine of separation of powers, the U.S. Constitution distributed the power of the federal government among these three branches, and built a system of checks and balances to ensure that no one branch could become too powerful.
