They found caves to live and survive from weather problems and wild animals.
The paleolithic people came near the fire when they felt cold.
They invented how to do farming and grew plants.
In the paleolithic age people lives in caves made up of rocks and hunted animals and drunk water from the rivers near them.
They hunting animals like fishes, iguanas, etc...The invented to rub rock together to create fire and they put rocks underneath the sticks of fire so that the fire could't cause the jungle or the animals any harm.
They also invented how to grow crops and discovered that which plant could be eaten and which could't.