The formation of the Isthmus had major consequences on global temperatures, because warm equatorial ocean currents were cut off. Central America formed completely during the Pliocene, to leave their native habitats and colonize new areas. Africa's collision with Asia created the Mediterranean Sea, cutting off the remnants of the Tethys Ocean. During the Pleistocene, the modern continents were essentially at their present positions.


The Paleolithic age is also known as old stone age.TheĀ  fire was discovered in this age.In this age people were nomadic in search of food and shelter.