The early men were

  Which animal drawn chariot became the symbol of authority?

 Mesolithic age is also known as

Wheels are made with _________ in Neolithic age.

 ______ age is supposed to be the boundary bridge between old stone age and civilized world.

_____________ was the first stand erect stage of evolution.

____________ came after Neolithic age.

 What is another episode in the cycle of evolution?