How can be unlimited wish and enthusiasm the cause of trouble ?

answer; ///first they would cross the atlantic ocean, and end up either in europe or africa; good luck

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.

semi-desert lowlands, hope this !

answer; occurs if the conflict is recognized logically and intellectualized;