Answer:
Hydraulic mining developed from ancient Roman techniques that used water to excavate soft underground deposits. Its modern form, using pressurized water jets produced by a nozzle called a "monitor", came about in the 1850s during the California Gold Rush in the United States.
Explanation:
Mound Builders built those, but you can find pyramids made by the indigenous people of America all across both the Americas.
Answer:
One of the first major impacts of the crusades was that it increased interaction between different societies and groups of people. For instance, the crusades caused the religions of Christianity, Judaism and Islam to clash.
Explanation:
In 1492, Christopher Columbus, supported by the Spanish government, undertook a voyage to find a new route to Asia and inadvertently encountered “new” lands in the Americas full of long established communities and cultures. Other European countries quickly followed suit and began to explore and invade the New World.
