The Incas were highly advanced in terms of mathematics and
astronomy. Their unique architecture of
massive stonework is made possible by their great understanding of mathematics.
Inca structures where made of precisely hewn stones that fit together so
perfectly without use of mortar. They also understood astronomy and made very
accurate calendars.
<span>Supporters of the Union side in the Civil War generally supported the "Republican" party, since the Republicans were against the institution of slavery. </span>
