Religion, many people believe that there is rebirth, I think there is rebirth but chance of reborn as human with stored memory is very little (may be there is, i am not sure).
But I got scientific back up for this theory. This is simply my theory which could be wrong or right.
I am backing up my theory of rebirth by using the Albert Einstein's equation.
Albert Einstein’s revolutionary scientific papers published in 1905 states an equation about relation between energy, mass and speed
E=mc2 where E is energy, m is mass, and c is the speed of light in a vacuum.
Human or any living being is composed of mass and energy, when human's or living being die there body is decomposed and forms certain kind of energy. When new life born on earth. the energy which was left by dead living being will be used either directly or indirectly.
This shows mass from living being is converted in to energy and which again converted in to mass. This means there is rebirth but its not necessary as same living being and not necessary help to form only one human being.
Dr Srinivas Velugotla