What is another episode in the cycle of evolution?

 Mid stone age developed _______________ language .

Wheels are made with _________ in Neolithic age.

 Mesolithic age is also known as

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

According to the nature of our requirements, the size of the ______________ also changes.

_____________ was the first stand erect stage of evolution.

 The early men were