Then it crept and slithered along the ground, Moving from side to side, not making a sound, Except for its hair, which hissed and squirmed, And caused an awful scare. With its arms It tried to reach the people to cause them harm, And with one other way, to catch its prey, It looked at them, turned them into stone, Until it was thrown back into the past To rest . . . at last. Who - or what - is it? Answer: Medusa.