Possibility Of A Reverter

The possibility of the ownership of the land or property being returned to the grantor/giver of the the same or to his/her heirs.For eg, a grantor of the land can have a condition in the deal that if his land is not used for a purpose of scientific research, in future, its ownership will be returned to him or his heirs. Here, there is a possibility of future interest in property unless his heir die without futher heirs.