The picture above shown vessels from the neolithic period. what mystery is unanswered by historians regarding ceramic vessels such as these? what is a most common explanation for the mystery?

The interesting point about pottery vessels like these, is why people in Europe did not produce these much earlier. Even though they understood the process of firing the clay as early as 32,000 BCE, it was not until 7000 BCE that they began making vessels using the same technique. Some historians believed that ceramic vessels were not used because of the time, effort, and expense of using them. Ceramic vessels were also much heavier and more fragile than vessels made out of other materials such as wood or fibers

i think it is northeast