What were the bones of Deucalion and Pyrrha's mother?

The correct answer is that the bones of Deucalion and Pyrrha's mother were stones. In Greek mythology, Deucalion and Pyrrha are known for surviving a great flood sent by Zeus to cleanse the earth of human wickedness. Following the flood, they were tasked with repopulating the world. According to the myth, they were told by the Delphic oracle to throw the "bones of their mother" behind them, which they interpreted as throwing stones.

In this context, the term "mother" refers to Mother Earth (Gaia), so the "bones" are symbolically the stones from the earth. When Deucalion and Pyrrha cast these stones, they transformed into humans—Deucalion's stones became men and Pyrrha's stones became women, thus restoring humanity. This myth serves as an allegory of rebirth and regeneration after destruction, illustrating how life can emerge from the foundations of the earth itself.