What reasons forced the Europeans to look for new lands? What technical advances have allowed

What reasons forced the Europeans to look for new lands? What technical advances have allowed the Europeans to make geo. discovering and conquering new lands?

There were such reasons for the search for new lands:

Thirst for profit and wealth;
Striving to start new scientific discoveries;
Striving to find new lands for development;
Desire to develop maritime trade.

In the 15th century, people were able to invent the Astrolabe, which made it possible to determine the location of the ship by the stars. Also at the same time, people learned to build large ships, which were called caravels. These were large ships that could withstand sea storms and long voyages.