the Roman Empire had declined in the west and Europe was ruled by different kingdoms so no one really new or cared or had enough money for it.
percental decline = (old-new):old x 100 (800-432)/800 x 100 = 46%
1600 years
800 mi by road.
800'
about 800 miles
Gunpowder is the first explosive substance mankind learned to use and was one of the four great inventions of ancient China. The Chinese used gunpowder as early as 800-1000 AD, for fireworks and later for weapons. It was not in widespread use in Europe until around the 1300s. Gunpowder reached Europe through the Silk Road trade.
About 800 km!
Absolutely zero.
800 miles!!!!!!!!!!
first the silkworms are fed on the leaves of the mulberry bush. then each silkworm spins a continuous thread up to 800 metres long to form a cocoon. then the silkworms are boiled in water and silk is obtained from them
about 800 miles
The distance from Boston, Massachusetts to North Carolina can vary depending on the specific cities involved, but on average it is around 750-800 miles by road.