Congenital insensivity to pain or simply congenital analgesia is a condition when the patient doesn't feel any pain and temperature changes.
Where "congenital" word refers to a disease that starts from birth
Diversity is the difference between people
Answer:
The tread on the road declined sharply till in the 13th century,when the conquests of the Mongols ushered in an era of frequent and extended contacts between East and West...
With less cost,harassment and danger,many goods and materials that the Silk Road could not transfer were conveyed through the sea route.
