How were the Romans able to build bigger arches than anyone
before them?
by mixing stone and sand with cement to make concrete
by designing outdoor stadiums for sports events
by placing domes on top of their vaults

Where did khomeini seize power in 1979?

What are your thoughts about " the attacking on the twin towers". in your own words a little paragraph its for a project i am doing and i want to get intel from other people so that i can put it on my poster. for anyone who gives me there opinion on it : ) enter you name when you type the paragraph more than one person to respond.

Due to what conditions were slaves brought into brazil to work the fields? the climate was similar to that of africa. the indigenous workers were hired as managers. the indigenous workers had died from exposure to diseases from europe. slaves from africa were already used in other regions and brazil was the next location.