I think a but its your choice
The Ancient Persians invented their own alphabet, the wind-power machine and Qantas, a water irrigation system. They also developed their own coinage system.The ancient Persian leaders worked hard to ensure their empire succeeded.
The Persian Empire was important for many reasons. ... The Persians developed their empire in a manner that future empires would emulate. The Persians created a mail system. They built roads and developed a communication system throughout their empire.
Hol up, what? I dont get this question
NASA shuttle mission took place in 1992
