Why do you think the ancient Egyptians spent so much time and effort to mummify people and animals?

This is why, the Egyptians came up with the idea of mummifying their dead, so that they could enter the afterlife, and live a happy and a smooth life even there. The Egyptians, however, did not set out to discover the technique of mummification.

Explanation: I might be wrong???!

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.

answer; no longer than a reasonable period of time;