WHY DO YOU BELIEVE IT TOOK ALMOST 500 YEARS (1000AD-1500 AD) FOR ANOTHER EUROPEAN
COUNTRY TO BEGIN EXPLORING AGAIN?

Internal War and Disease (Put simply)

Explanation:

Medical treatment at that time was low and so required attention.

War at that time was high time so people fought each other.

answer; allows decision to stand;

answer; they are called (pebbling);