The black death in europe killed off 1/3 of the population, it impacted religion in a way because many people believed it was gods punishment for sin. in 1347, 200 million were dead in the span of just four years
To try and prevent another world war from breaking out and obviously that didn't work.
I already answered this for you. It's Persian messengers.
On May 31, 2009, a team of engineers at Woods Hole Oceanographic Institution (WHOI) celebrated as the unique vehicle called Nereus<span> dove to 10,902 meters (6.8 miles) in the western Pacific Ocean’s Mariana Trench.</span>
A) It became the first remote operated deep-sea robot
Hope it helps
