NEW YORK - A 41-foot raft made of reeds and wooden planks set out Wednesday on voyage from New York to Spain, a daring and perhaps foolhardy attempt to prove people in the Stone Age could have crossed the Atlantic. The fragile-looking craft was towed down the harbor past the Statue of Liberty, to be cut loose once it passed into the open sea. At the helm was Dominique Gorlitz, 41, a German botanist and ex-teacher who has spent years preparing for the expedition. "We are trying to retrace the ancient waterways to prove that prehistoric people crossed the ocean...